21681520 (number)

21681520 is an even 8-digits composite number following 21681519 and preceding 21681521. In scientific notation, it is written as 2.1681520 × 10^7. The sum of its digits is 25. It has a total of 7 prime factors and 40 positive divisors. There are 7432320 positive integers (up to 21681520) that are relatively prime to 21681520.

Interesting facts

Basic properties

Name

Name twenty-one million six hundred eighty-one thousand five hundred twenty

Notation

Scientific notation 2.1681520 × 10^7
Engineering notation 2.1681520 × 10^6

Prime Factorization of 21681520

Prime Factorization 2 × 2 × 2 × 2 × 5 × 49 × 5531

Composite number
ω Distinct Factors 4
Total number of distinct prime factors
Ω Total Factors 7
Total number of prime factors
rad Radical 2710190
Product of the distinct prime numbers

The prime factorization of 21681520 is 2 × 2 × 2 × 2 × 5 × 49 × 5531. Since it has a total of 7 prime factors.

Most popular turbo-numbers

Basic calculations (n = 21681520)

Multiplication

n×y
n×2 43363040
n×3 65044560
n×4 86726080
n×5 108407600

Division

n÷y
n÷2 10840760
n÷3 7227173.3333333
n÷3 5420380
n÷5 4336304

Exponentiation

ny
n2 470088309510400
n3 1.0192229084416E+22
n4 2.2098301873835E+29
n5 4.7912477404358E+36

Nth Root

y√n
2√n 4656.3419118445
3√n 278.84524418618
4√n 68.237393794345
5√n 29.323644454359

Divisors of 21681520

40 divisors

τ Total Divisors 40
Total number of the positive divisors of n
σ Sum of Divisors 1
Sum of all the positive divisors of n
s Aliquot Sum -21681519
Sum of the proper positive divisors of n
A Arithmetic Mean 0.025
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 40
Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 21681520 can be divided by 40 positive divisors. The sum of these divisors (counting 21681520) is 1, the average is 0.025.

Base conversion 21681520

Base System Value
2 Binary 1010010101101010101110000
3 Ternary 1111210112110021
4 Quaternary 1102231111300
5 Quinary 21022302040
6 Senary 2052413224
8 Octal 122552560
10 Decimal 21681520
12 Duodecimal 7317214
16 Hexadecimal 14ad570
20 Vigesimal 6fa3g0
36 Base36 cwpkg

Cryptographic Hash Functions

md5 8cba188df2a7f320827014b27769e55e
sha1 d5e3b2dc9b53d64a73c6c3ee27e0f580d19221a1
sha256 de1ca82a6d3fd0c8063f94592a5e3044db0c4b62dee0aec226d824aa8f51d100
sha512 3fc63f12956afadaf7c768744e4bf4f8d1fc517e606afe6c9cb46fe3ea72b473aef9418cff8b1c15eaa74c16c0d4880ebabe2d6cc4dee255c9c28654a71e076d
ripemd-160 2380abd8dfa1235699bbf5b7066aa2e3a5694e95

21681520 as geometric shapes

Circle

Radius = n
Diameter 43363040
Circumference 136229007.90132
Area 1.4768259796963E+15

Sphere

Radius = n
Volume 4.269310935374E+22
Surface area 5.9073039187853E+15
Circumference 136229007.90132

Square

Length = n
Perimeter 86726080
Area 470088309510400
Diagonal 30662299.636864

Cube

Length = n
Surface area 2820529857062400
Volume 1.0192229084416E+22
Space diagonal 37553494.225321

Equilateral Triangle

Length = n
Perimeter 65044560
Area 2.0355420902904E+14
Altitude 18776747.11266

Triangular Pyramid

Length = n
Surface area 2.0355420902904E+14
Volume 1.2011657168329E+21
Height 10220766.545621