21001808 (number)

21001808 is an even 8-digits composite number following 21001807 and preceding 21001809. In scientific notation, it is written as 2.1001808 × 10^7. The sum of its digits is 20. It has a total of 6 prime factors and 20 positive divisors. There are 10356480 positive integers (up to 21001808) that are relatively prime to 21001808.

Interesting facts

Basic properties

Name

Name twenty-one million one thousand eight hundred eight

Notation

Scientific notation 2.1001808 × 10^7
Engineering notation 2.1001808 × 10^6

Prime Factorization of 21001808

Prime Factorization 2 × 2 × 2 × 2 × 73 × 17981

Composite number
ω Distinct Factors 3
Total number of distinct prime factors
Ω Total Factors 6
Total number of prime factors
rad Radical 2625226
Product of the distinct prime numbers

The prime factorization of 21001808 is 2 × 2 × 2 × 2 × 73 × 17981. Since it has a total of 6 prime factors.

Most popular turbo-numbers

6, 10, 25, 61, 157, 578, 7434, 3448, 64327, 92648, 307907, 724565, 84440, 3090986, 13052242, 4479624, 176298978, 437418396, 2875882722, 1874250527

Basic calculations (n = 21001808)

Multiplication

n×y
n×2 42003616
n×3 63005424
n×4 84007232
n×5 105009040

Division

n÷y
n÷2 10500904
n÷3 7000602.6666667
n÷3 5250452
n÷5 4200361.6

Exponentiation

ny
n2 441075939268864
n3 9.2633921899443E+21
n4 1.9454798420191E+29
n5 4.0858594109956E+36

Nth Root

y√n
2√n 4582.7729596828
3√n 275.90033508536
4√n 67.696181278436
5√n 29.137436278749

Divisors of 21001808

1, 2, 4, 8, 16, 73, 146, 292, 584, 1168, 17981, 35962, 71924, 143848, 287696, 1312613, 2625226, 5250452, 10500904, 21001808

20 divisors

τ Total Divisors 20
Total number of the positive divisors of n
σ Sum of Divisors 1
Sum of all the positive divisors of n
s Aliquot Sum -21001807
Sum of the proper positive divisors of n
A Arithmetic Mean 0.05
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 20
Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 21001808 can be divided by 20 positive divisors. The sum of these divisors (counting 21001808) is 1, the average is 0.05.

Base conversion 21001808

Base System Value
2 Binary 1010000000111011001010000
3 Ternary 1110112000001202
4 Quaternary 1100013121100
5 Quinary 20334024213
6 Senary 2030050332
8 Octal 120073120
10 Decimal 21001808
12 Duodecimal 70499a8
16 Hexadecimal 1407650
20 Vigesimal 6b54a8
36 Base36 ci53k

Cryptographic Hash Functions

md5 c15183bd74443b1e15929290dc956efa
sha1 400277f337c69c66919dfa18c899ae85a2f3d6e5
sha256 47f5c758abc5d856656e524ee00a77a7c11f11fdf96db1926b9dc153174ea6ea
sha512 b3af98fe84b20fed78d5f28dde3d4e20c07ef20c1e7c32f39cc12b8a42069f70a93e17986dbcc52d47e07ea3716bca31f6c1d9e672327ed3ac32cb89d1401942
ripemd-160 ffe037d49b548316a367c4d20900b4b77374187e

21001808 as geometric shapes

Circle

Radius = n
Diameter 42003616
Circumference 131958251.44981
Area 1.3856809304823E+15

Sphere

Radius = n
Volume 3.8802406468334E+22
Surface area 5.5427237219291E+15
Circumference 131958251.44981

Square

Length = n
Perimeter 84007232
Area 441075939268864
Diagonal 29701041.707956

Cube

Length = n
Surface area 2646455635613184
Volume 9.2633921899443E+21
Space diagonal 36376198.506807

Equilateral Triangle

Length = n
Perimeter 63005424
Area 1.9099148420246E+14
Altitude 18188099.253403

Triangular Pyramid

Length = n
Surface area 1.9099148420246E+14
Volume 1.09170123905E+21
Height 9900347.2359853