21491808 (number)
21491808 is an even 8-digits composite number following 21491807 and preceding 21491809. In scientific notation, it is written as 2.1491808 × 10^7. The sum of its digits is 33. It has a total of 8 prime factors and 48 positive divisors. There are 6217728 positive integers (up to 21491808) that are relatively prime to 21491808.
Interesting facts
- 21491808 has 48 divisors, whose sum is 56727216
- The reverse of 21491808 is 80819412
- Previous prime number is 221
Basic properties
- Is Prime? no
- Number parity even
- Number length 8
- Sum of Digits 33
- Digital Root 6
Name
Name | twenty-one million four hundred ninety-one thousand eight hundred eight |
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Notation
Scientific notation | 2.1491808 × 10^7 |
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Engineering notation | 2.1491808 × 10^6 |
Prime Factorization of 21491808
Prime Factorization 2 × 2 × 2 × 2 × 2 × 3 × 221 × 1013
Composite numberω | Distinct Factors | 4 | Total number of distinct prime factors |
---|---|---|---|
Ω | Total Factors | 8 | Total number of prime factors |
rad | Radical | 1343238 | Product of the distinct prime numbers |
The prime factorization of 21491808 is 2 × 2 × 2 × 2 × 2 × 3 × 221 × 1013. Since it has a total of 8 prime factors.
Most popular turbo-numbers
Basic calculations (n = 21491808)
Multiplication
n×yn×2 | 42983616 |
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n×3 | 64475424 |
n×4 | 85967232 |
n×5 | 107459040 |
Division
n÷yn÷2 | 10745904 |
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n÷3 | 7163936 |
n÷3 | 5372952 |
n÷5 | 4298361.6 |
Exponentiation
nyn2 | 461897811108864 |
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n3 | 9.927019071972E+21 |
n4 | 2.1334958790716E+29 |
n5 | 4.5852683801798E+36 |
Nth Root
y√n2√n | 4635.925797508 |
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3√n | 278.0295674433 |
4√n | 68.087633220049 |
5√n | 29.272147874613 |
Divisors of 21491808
48 divisors
τ | Total Divisors | 48 | Total number of the positive divisors of n |
---|---|---|---|
σ | Sum of Divisors | 1 | Sum of all the positive divisors of n |
s | Aliquot Sum | -21491807 | Sum of the proper positive divisors of n |
A | Arithmetic Mean | 0.020833333333333 | 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 | 48 | Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors |
The number 21491808 can be divided by 48 positive divisors. The sum of these divisors (counting 21491808) is 1, the average is 0.020833333333333.
Base conversion 21491808
Base | System | Value |
---|---|---|
2 | Binary | 1010001111111000001100000 |
3 | Ternary | 1111102220012220 |
4 | Quaternary | 1101333001200 |
5 | Quinary | 21000214213 |
6 | Senary | 2044351040 |
8 | Octal | 121770140 |
10 | Decimal | 21491808 |
12 | Duodecimal | 7245480 |
16 | Hexadecimal | 147f060 |
20 | Vigesimal | 6e69a8 |
36 | Base36 | csn6o |
Cryptographic Hash Functions
md5 | 2c0d81ce0f3c1f8a06d5d6cd615c8ea9 |
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sha1 | 7089da9ecbc38cfa8a3ed416abfe3efa52e8ec2b |
sha256 | 23a4bd41fac69b9e49586a486fed4c045383aa6deaa9056fe3078f331232f70e |
sha512 | 0106886484cdb496d8296cee6dd87cb9e8c4df8b85f8c55d9e4764e79783a7ae1c8fe6c8166694bb12aa9b9431811caacc0ff52d386c2dd737fcb85665023c5b |
ripemd-160 | 70765ffe633e7a2e77e55151fc3909549894a906 |
21491808 as geometric shapes
Circle
Radius = nDiameter | 42983616 |
---|---|
Circumference | 135037012.25032 |
Area | 1.4510947700888E+15 |
Sphere
Radius = nVolume | 4.1582200251404E+22 |
---|---|
Surface area | 5.8043790803553E+15 |
Circumference | 135037012.25032 |
Square
Length = nPerimeter | 85967232 |
---|---|
Area | 461897811108864 |
Diagonal | 30394006.353519 |
Cube
Length = nSurface area | 2771386866653184 |
---|---|
Volume | 9.927019071972E+21 |
Space diagonal | 37224903.402515 |
Equilateral Triangle
Length = nPerimeter | 64475424 |
---|---|
Area | 2.0000761918635E+14 |
Altitude | 18612451.701258 |
Triangular Pyramid
Length = nSurface area | 2.0000761918635E+14 |
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Volume | 1.1699104171266E+21 |
Height | 10131335.451173 |