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
- 21681520 has 40 divisors, whose sum is 51447600
- The reverse of 21681520 is 02518612
- Previous prime number is 49
Basic properties
- Is Prime? no
- Number parity even
- Number length 8
- Sum of Digits 25
- Digital Root 7
Name
Name | twenty-one million six hundred eighty-one thousand five hundred twenty |
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Notation
Scientific notation | 2.1681520 × 10^7 |
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Engineering notation | 2.1681520 × 10^6 |
Prime Factorization of 21681520
Prime Factorization 2 × 2 × 2 × 2 × 5 × 49 × 5531
Composite numberω | 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×yn×2 | 43363040 |
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n×3 | 65044560 |
n×4 | 86726080 |
n×5 | 108407600 |
Division
n÷yn÷2 | 10840760 |
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n÷3 | 7227173.3333333 |
n÷3 | 5420380 |
n÷5 | 4336304 |
Exponentiation
nyn2 | 470088309510400 |
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n3 | 1.0192229084416E+22 |
n4 | 2.2098301873835E+29 |
n5 | 4.7912477404358E+36 |
Nth Root
y√n2√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 |
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sha1 | d5e3b2dc9b53d64a73c6c3ee27e0f580d19221a1 |
sha256 | de1ca82a6d3fd0c8063f94592a5e3044db0c4b62dee0aec226d824aa8f51d100 |
sha512 | 3fc63f12956afadaf7c768744e4bf4f8d1fc517e606afe6c9cb46fe3ea72b473aef9418cff8b1c15eaa74c16c0d4880ebabe2d6cc4dee255c9c28654a71e076d |
ripemd-160 | 2380abd8dfa1235699bbf5b7066aa2e3a5694e95 |
21681520 as geometric shapes
Circle
Radius = nDiameter | 43363040 |
---|---|
Circumference | 136229007.90132 |
Area | 1.4768259796963E+15 |
Sphere
Radius = nVolume | 4.269310935374E+22 |
---|---|
Surface area | 5.9073039187853E+15 |
Circumference | 136229007.90132 |
Square
Length = nPerimeter | 86726080 |
---|---|
Area | 470088309510400 |
Diagonal | 30662299.636864 |
Cube
Length = nSurface area | 2820529857062400 |
---|---|
Volume | 1.0192229084416E+22 |
Space diagonal | 37553494.225321 |
Equilateral Triangle
Length = nPerimeter | 65044560 |
---|---|
Area | 2.0355420902904E+14 |
Altitude | 18776747.11266 |
Triangular Pyramid
Length = nSurface area | 2.0355420902904E+14 |
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Volume | 1.2011657168329E+21 |
Height | 10220766.545621 |