Math question: If the length of one side of a square is 18 units, what is the area of the square?

To find the area of a square, we square the length of one side. In this case, the side length is 18 units. So, the area of the square is equal to 18 units multiplied by 18 units, which is equal to 324 square units. Therefore, the area of the square is 324 square units.

Math question: What is the smallest natural number greater than 18 that is divisible by both 4 and 9?

To find the smallest number that is divisible by both 4 and 9, we need to find their least common multiple (LCM). The prime factorization of 4 is 2^2, and 9 is 3^2. Taking the highest exponent for each prime factor, the LCM of 4 and 9 is 2^2 * 3^2 = 36. Therefore, the smallest natural number greater than 18 that is divisible by both 4 and 9 is 36. This is because 18 is not divisible by 4, and the next multiple of 4 is 20, but it is not divisible by 9. Hence, the LCM 36 is the answer.

Math question: Find the product of 9 and 2 multiplied by the square of the difference between 7 and 3.

To solve this, first calculate the difference between 7 and 3, which is 4. The square of 4 is 16. Now, multiply 9 and 2, which results in 18. Finally, multiply 18 by 16, which equals 288. Therefore, the answer is 288.

Max	9223372036854775807
25835	Positive integer
0b10001100	Binary number
01771452	Octal number
0x129abf	Hex number
5.012 * 10^7	Scientific notation
2^4 * 5	Factorized form
*	Random number

18 (number)

18 is an even 2-digits composite number following 17 and preceding 19. In scientific notation, it is written as 1.8 × 10^1. The sum of its digits is 9. It has a total of 3 prime factors and 6 positive divisors. There are 6 positive integers (up to 18) that are relatively prime to 18.

Interesting facts

18 has 6 divisors, whose sum is 39
The reverse of 18 is 81
Previous prime number is 3

Basic properties

Is Prime? no
Number parity even
Number length 2
Sum of Digits 9
Digital Root 9

Name

Name	eighteen

Notation

Scientific notation	1.8 × 10^1
Engineering notation	1.8 × 10^0

Prime Factorization of 18

Prime Factorization 2 × 3 × 3

Composite number

ω	Distinct Factors	2	Total number of distinct prime factors
Ω	Total Factors	3	Total number of prime factors
rad	Radical	6	Product of the distinct prime numbers

The prime factorization of 18 is 2 × 3 × 3. Since it has a total of 3 prime factors.

Most popular turbo-numbers

9, 6, 93, 67, 763, 316, 9499, 558, 4435, 59688, 671811, 372475, 417393, 6719744, 79194501, 62637829, 375622768, 832843004, 6383919824, 2321121070

Basic calculations (n = 18)

Multiplication

n×y

n×2	36
n×3	54
n×4	72
n×5	90

Division

n÷y

n÷2	9
n÷3	6
n÷3	4.5
n÷5	3.6

Exponentiation

n^y

n²	324
n³	5832
n⁴	104976
n⁵	1889568

Nth Root

^y√n

²√n	4.2426406871193
³√n	2.6207413942089
⁴√n	2.0597671439071
⁵√n	1.782602457966

Divisors of 18

1, 2, 3, 6, 9, 18

6 divisors

τ	Total Divisors	6	Total number of the positive divisors of n
σ	Sum of Divisors	1	Sum of all the positive divisors of n
s	Aliquot Sum	-17	Sum of the proper positive divisors of n
A	Arithmetic Mean	0.16666666666667	Returns the sum of divisors (σ(n)) divided by the total number of divisors (τ(n))
G	Geometric Mean	1	Returns the nth root of the product of n divisors
H	Harmonic Mean	6	Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 18 can be divided by 6 positive divisors. The sum of these divisors (counting 18) is 1, the average is 0.16666666666667.

Base conversion 18

Base	System	Value
2	Binary	10010
3	Ternary	200
4	Quaternary	102
5	Quinary	33
6	Senary	30
8	Octal	22
10	Decimal	18
12	Duodecimal	16
16	Hexadecimal	12
20	Vigesimal	i
36	Base36	i

Cryptographic Hash Functions

md5	6f4922f45568161a8cdf4ad2299f6d23
sha1	9e6a55b6b4563e652a23be9d623ca5055c356940
sha256	4ec9599fc203d176a301536c2e091a19bc852759b255bd6818810a42c5fed14a
sha512	f107ba2da059fa640eccb9533e859a6435f6b83aa2e0636a47444dfdcde33a6e1f3cc1c9437bcfd42675af265a0d0b9d66c86c9e66347aa41534204745e41fb8
ripemd-160	64165163aeecd0061ac74cbf2fb968738ac4fe89

18 as geometric shapes

Circle

Radius = n

Diameter	36
Circumference	113.09733552923
Area	1017.8760197631

Sphere

Radius = n

Volume	24429.024474314
Surface area	4071.5040790524
Circumference	113.09733552923

Square

Length = n

Perimeter	72
Area	324
Diagonal	25.455844122716

Cube

Length = n

Surface area	1944
Volume	5832
Space diagonal	31.17691453624

Equilateral Triangle

Length = n

Perimeter	54
Area	140.29611541308
Altitude	15.58845726812

Triangular Pyramid

Length = n

Surface area	140.29611541308
Volume	687.30779131332
Height	8.4852813742386