21397968 (number)
21397968 is an even 8-digits composite number following 21397967 and preceding 21397969. In scientific notation, it is written as 2.1397968 × 10^7. The sum of its digits is 45. It has a total of 7 prime factors and 40 positive divisors. There are 6712320 positive integers (up to 21397968) that are relatively prime to 21397968.
Interesting facts
- 21397968 has 40 divisors, whose sum is 48780360
- The reverse of 21397968 is 86979312
- Previous prime number is 17
Basic properties
- Is Prime? no
- Number parity even
- Number length 8
- Sum of Digits 45
- Digital Root 9
Name
Name | twenty-one million three hundred ninety-seven thousand nine hundred sixty-eight |
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Notation
Scientific notation | 2.1397968 × 10^7 |
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Engineering notation | 2.1397968 × 10^6 |
Prime Factorization of 21397968
Prime Factorization 2 × 2 × 2 × 2 × 9 × 17 × 8741
Composite numberω | Distinct Factors | 4 | Total number of distinct prime factors |
---|---|---|---|
Ω | Total Factors | 7 | Total number of prime factors |
rad | Radical | 2674746 | Product of the distinct prime numbers |
The prime factorization of 21397968 is 2 × 2 × 2 × 2 × 9 × 17 × 8741. Since it has a total of 7 prime factors.
Most popular turbo-numbers
Basic calculations (n = 21397968)
Multiplication
n×yn×2 | 42795936 |
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n×3 | 64193904 |
n×4 | 85591872 |
n×5 | 106989840 |
Division
n÷yn÷2 | 10698984 |
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n÷3 | 7132656 |
n÷3 | 5349492 |
n÷5 | 4279593.6 |
Exponentiation
nyn2 | 457873034529024 |
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n3 | 9.797552540915E+21 |
n4 | 2.0964771574882E+29 |
n5 | 4.4860351128663E+36 |
Nth Root
y√n2√n | 4625.7937697221 |
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3√n | 277.62432218577 |
4√n | 68.013188204363 |
5√n | 29.246540829428 |
Divisors of 21397968
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 | -21397967 | 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 21397968 can be divided by 40 positive divisors. The sum of these divisors (counting 21397968) is 1, the average is 0.025.
Base conversion 21397968
Base | System | Value |
---|---|---|
2 | Binary | 1010001101000000111010000 |
3 | Ternary | 1111021010111100 |
4 | Quaternary | 1101220013100 |
5 | Quinary | 20434213333 |
6 | Senary | 2042344400 |
8 | Octal | 121500720 |
10 | Decimal | 21397968 |
12 | Duodecimal | 71bb100 |
16 | Hexadecimal | 14681d0 |
20 | Vigesimal | 6deei8 |
36 | Base36 | cqms0 |
Cryptographic Hash Functions
md5 | 230b087c0e661133754e7472bb62b874 |
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sha1 | bbd518b3bdb618139e5e10c8f2fa14c5a71b13d8 |
sha256 | 91191ee29e12bf9c492394491be1417db4b411a04bf88dfec749c72c669b79d3 |
sha512 | e1c64c86e8101d7dccd723f436633af15edfceb484734874804cf89b36da8b17c978355d422702c8adffed79ad60e48955a31a6fedab15e10c8063b529c8a022 |
ripemd-160 | f73618e0e702846fd2269ab66624d27f2fab1cb8 |
21397968 as geometric shapes
Circle
Radius = nDiameter | 42795936 |
---|---|
Circumference | 134447398.1411 |
Area | 1.4384505615532E+15 |
Sphere
Radius = nVolume | 4.1039892114265E+22 |
---|---|
Surface area | 5.753802246213E+15 |
Circumference | 134447398.1411 |
Square
Length = nPerimeter | 85591872 |
---|---|
Area | 457873034529024 |
Diagonal | 30261296.552825 |
Cube
Length = nSurface area | 2747238207174144 |
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Volume | 9.797552540915E+21 |
Space diagonal | 37062367.754733 |
Equilateral Triangle
Length = nPerimeter | 64193904 |
---|---|
Area | 1.98264839805E+14 |
Altitude | 18531183.877366 |
Triangular Pyramid
Length = nSurface area | 1.98264839805E+14 |
---|---|
Volume | 1.1546526401187E+21 |
Height | 10087098.850942 |