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

21279987 (number)

21279987 is an odd 8-digits composite number following 21279986 and preceding 21279988. In scientific notation, it is written as 2.1279987 × 10^7. The sum of its digits is 45. It has a total of 3 prime factors and 8 positive divisors. There are 14112000 positive integers (up to 21279987) that are relatively prime to 21279987.

Interesting facts

21279987 has 8 divisors, whose sum is 23768880
The reverse of 21279987 is 78997212
Previous prime number is 193

Basic properties

Is Prime? no
Number parity odd
Number length 8
Sum of Digits 45
Digital Root 9

Name

Name	twenty-one million two hundred seventy-nine thousand nine hundred eighty-seven

Notation

Scientific notation	2.1279987 × 10^7
Engineering notation	2.1279987 × 10^6

Prime Factorization of 21279987

Prime Factorization 9 × 193 × 12251

Composite number

ω	Distinct Factors	3	Total number of distinct prime factors
Ω	Total Factors	3	Total number of prime factors
rad	Radical	21279987	Product of the distinct prime numbers

The prime factorization of 21279987 is 9 × 193 × 12251. Since it has a total of 3 prime factors.

Most popular turbo-numbers

8, 10, 23, 85, 612, 393, 4311, 2707, 41967, 65398, 285940, 416762, 9165692, 331186, 46962446, 1544381, 770371325, 94373679, 2172721182, 9030206829

Basic calculations (n = 21279987)

Multiplication

n×y

n×2	42559974
n×3	63839961
n×4	85119948
n×5	106399935

Division

n÷y

n÷2	10639993.5
n÷3	7093329
n÷3	5319996.75
n÷5	4255997.4

Exponentiation

n^y

n²	452837846720169
n³	9.6363834913132E+21
n⁴	2.0506211542216E+29
n⁵	4.363719150376E+36

Nth Root

^y√n

²√n	4613.0236288144
³√n	277.11314001747
⁴√n	67.919243435233
⁵√n	29.214218401129

Divisors of 21279987

1, 9, 193, 1737, 12251, 110259, 2364443, 21279987

8 divisors

τ	Total Divisors	8	Total number of the positive divisors of n
σ	Sum of Divisors	1	Sum of all the positive divisors of n
s	Aliquot Sum	-21279986	Sum of the proper positive divisors of n
A	Arithmetic Mean	0.125	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	8	Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 21279987 can be divided by 8 positive divisors. The sum of these divisors (counting 21279987) is 1, the average is 0.125.

Base conversion 21279987

Base	System	Value
2	Binary	1010001001011010011110011
3	Ternary	1111001010122200
4	Quaternary	1101023103303
5	Quinary	20421424422
6	Senary	2040034243
8	Octal	121132363
10	Decimal	21279987
12	Duodecimal	7162983
16	Hexadecimal	144b4f3
20	Vigesimal	6cjjj7
36	Base36	co3qr

Cryptographic Hash Functions

md5	d94299521459f2dbeafbd4d64ec1cce8
sha1	d14d69b842e39541aa65f1123136f8612840e44a
sha256	5f94ec745ded9d17b756ce04a9258e48896be93a08d6d19c8e428a3eae2b1c6c
sha512	dd427a9e31f7e081d38bba67c386bea16c8a7ed66193151aed31e4fc826758da71b81fb69fb738f31c97e2bd59c80cddc1bc2f5e22bf85bc3b283c338727fa92
ripemd-160	bbfd3c9f2db4866f91ff4e5ac1a130eb62259d31

21279987 as geometric shapes

Circle

Radius = n

Diameter	42559974
Circumference	133706101.65537
Area	1.4226320525235E+15

Sphere

Radius = n

Volume	4.0364788777978E+22
Surface area	5.690528210094E+15
Circumference	133706101.65537

Square

Length = n

Perimeter	85119948
Area	452837846720169
Diagonal	30094446.222523

Cube

Length = n

Surface area	2717027080321014
Volume	9.6363834913132E+21
Space diagonal	36858018.668405

Equilateral Triangle

Length = n

Perimeter	63839961
Area	1.9608453952736E+14
Altitude	18429009.334203

Triangular Pyramid

Length = n

Surface area	1.9608453952736E+14
Volume	1.1356586854703E+21
Height	10031482.074174