21487788 (number)

21487788 is an even 8-digits composite number following 21487787 and preceding 21487789. In scientific notation, it is written as 2.1487788 × 10^7. The sum of its digits is 45. It has a total of 5 prime factors and 24 positive divisors. There are 5987520 positive integers (up to 21487788) that are relatively prime to 21487788.

Interesting facts

Basic properties

Name

Name twenty-one million four hundred eighty-seven thousand seven hundred eighty-eight

Notation

Scientific notation 2.1487788 × 10^7
Engineering notation 2.1487788 × 10^6

Prime Factorization of 21487788

Prime Factorization 2 × 2 × 189 × 43 × 661

Composite number
ω Distinct Factors 4
Total number of distinct prime factors
Ω Total Factors 5
Total number of prime factors
rad Radical 10743894
Product of the distinct prime numbers

The prime factorization of 21487788 is 2 × 2 × 189 × 43 × 661. Since it has a total of 5 prime factors.

Most popular turbo-numbers

5, 3, 94, 95, 161, 237, 3944, 4126, 48625, 11000, 122802, 185158, 4936864, 5883416, 59528055, 65644001, 128500803, 326679504, 2481896185, 7138154316

Basic calculations (n = 21487788)

Multiplication

n×y
n×2 42975576
n×3 64463364
n×4 85951152
n×5 107438940

Division

n÷y
n÷2 10743894
n÷3 7162596
n÷3 5371947
n÷5 4297557.6

Exponentiation

ny
n2 461725033132944
n3 9.9214496262537E+21
n4 2.1319000622162E+29
n5 4.5809816574088E+36

Nth Root

y√n
2√n 4635.4922068751
3√n 278.0122314029
4√n 68.084449082556
5√n 29.271052733248

Divisors of 21487788

1, 2, 4, 43, 86, 172, 189, 378, 661, 756, 1322, 2644, 8127, 16254, 28423, 32508, 56846, 113692, 124929, 249858, 499716, 5371947, 10743894, 21487788

24 divisors

τ Total Divisors 24
Total number of the positive divisors of n
σ Sum of Divisors 1
Sum of all the positive divisors of n
s Aliquot Sum -21487787
Sum of the proper positive divisors of n
A Arithmetic Mean 0.041666666666667
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 24
Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 21487788 can be divided by 24 positive divisors. The sum of these divisors (counting 21487788) is 1, the average is 0.041666666666667.

Base conversion 21487788

Base System Value
2 Binary 1010001111110000010101100
3 Ternary 1111102200201000
4 Quaternary 1101332002230
5 Quinary 21000102123
6 Senary 2044320300
8 Octal 121760254
10 Decimal 21487788
12 Duodecimal 7243090
16 Hexadecimal 147e0ac
20 Vigesimal 6e5j98
36 Base36 csk30

Cryptographic Hash Functions

md5 93478cb1bc49b6108a4538b23201f5d8
sha1 81fd0a5ecb949c5cb1f18d03b1b474b5a3b24a3f
sha256 e2f7f5eed425d617fc18e90f29abff82b1893d12f216c309e3ccf408e92ab168
sha512 cdc1cb37aaaee89dbff96efcad2240c6ebda47551a992ae6fda616617dadc37ad3ba341efef59c5de4990e7a5b15ee7c18ea0f7cce43d337ca461c2542f56688
ripemd-160 4d3936dc99d6511e29da0b02e272c6420bfbd92b

21487788 as geometric shapes

Circle

Radius = n
Diameter 42975576
Circumference 135011753.84539
Area 1.450551972069E+15

Sphere

Radius = n
Volume 4.1558871011733E+22
Surface area 5.8022078882758E+15
Circumference 135011753.84539

Square

Length = n
Perimeter 85951152
Area 461725033132944
Diagonal 30388321.214998

Cube

Length = n
Surface area 2770350198797664
Volume 9.9214496262537E+21
Space diagonal 37217940.558269

Equilateral Triangle

Length = n
Perimeter 64463364
Area 1.9993280412817E+14
Altitude 18608970.279134

Triangular Pyramid

Length = n
Surface area 1.9993280412817E+14
Volume 1.1692540516541E+21
Height 10129440.404999