21287968 (number)
21287968 is an even 8-digits composite number following 21287967 and preceding 21287969. In scientific notation, it is written as 2.1287968 × 10^7. The sum of its digits is 43. It has a total of 8 prime factors and 48 positive divisors. There are 9676800 positive integers (up to 21287968) that are relatively prime to 21287968.
Interesting facts
- 21287968 has 48 divisors, whose sum is 45818136
- The reverse of 21287968 is 86978212
- Previous prime number is 73
Basic properties
- Is Prime? no
- Number parity even
- Number length 8
- Sum of Digits 43
- Digital Root 7
Name
Name | twenty-one million two hundred eighty-seven thousand nine hundred sixty-eight |
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Notation
Scientific notation | 2.1287968 × 10^7 |
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Engineering notation | 2.1287968 × 10^6 |
Prime Factorization of 21287968
Prime Factorization 2 × 2 × 2 × 2 × 2 × 13 × 73 × 701
Composite numberω | Distinct Factors | 4 | Total number of distinct prime factors |
---|---|---|---|
Ω | Total Factors | 8 | Total number of prime factors |
rad | Radical | 1330498 | Product of the distinct prime numbers |
The prime factorization of 21287968 is 2 × 2 × 2 × 2 × 2 × 13 × 73 × 701. Since it has a total of 8 prime factors.
Most popular turbo-numbers
Basic calculations (n = 21287968)
Multiplication
n×yn×2 | 42575936 |
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n×3 | 63863904 |
n×4 | 85151872 |
n×5 | 106439840 |
Division
n÷yn÷2 | 10643984 |
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n÷3 | 7095989.3333333 |
n÷3 | 5321992 |
n÷5 | 4257593.6 |
Exponentiation
nyn2 | 453177581569024 |
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n3 | 9.6472298547588E+21 |
n4 | 2.0536992043675E+29 |
n5 | 4.3719082944201E+36 |
Nth Root
y√n2√n | 4613.8885985685 |
---|---|
3√n | 277.14777919179 |
4√n | 67.925610770669 |
5√n | 29.216409414749 |
Divisors of 21287968
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 | -21287967 | 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 21287968 can be divided by 48 positive divisors. The sum of these divisors (counting 21287968) is 1, the average is 0.020833333333333.
Base conversion 21287968
Base | System | Value |
---|---|---|
2 | Binary | 1010001001101010000100000 |
3 | Ternary | 1111001112121021 |
4 | Quaternary | 1101031100200 |
5 | Quinary | 20422203333 |
6 | Senary | 2040135224 |
8 | Octal | 121152040 |
10 | Decimal | 21287968 |
12 | Duodecimal | 7167514 |
16 | Hexadecimal | 144d420 |
20 | Vigesimal | 6d0ji8 |
36 | Base36 | co9wg |
Cryptographic Hash Functions
md5 | 50fc90d38a78eb2736e378eda991c70d |
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sha1 | 4b669af7c06e4387be49488fb37e952c67e304b3 |
sha256 | 619e495c85e75e0f378f35f8424924df6ef4c5c4b8aa4650a59a14fc7b3aa453 |
sha512 | 143ad03aa45689d6b1d6a6b1242a43d40c508f5a7459f75f6cec9ffd4b51800d8c8f73598b68d2aea16d389144a34ebb455d770f72db8d00475a04504741c2cb |
ripemd-160 | 6a902e386fabacb01d6b754e260e51e592581c37 |
21287968 as geometric shapes
Circle
Radius = nDiameter | 42575936 |
---|---|
Circumference | 133756247.75731 |
Area | 1.4236993610288E+15 |
Sphere
Radius = nVolume | 4.0410221918936E+22 |
---|---|
Surface area | 5.6947974441153E+15 |
Circumference | 133756247.75731 |
Square
Length = nPerimeter | 85151872 |
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Area | 453177581569024 |
Diagonal | 30105733.060964 |
Cube
Length = nSurface area | 2719065489414144 |
---|---|
Volume | 9.6472298547588E+21 |
Space diagonal | 36871842.1659 |
Equilateral Triangle
Length = nPerimeter | 63863904 |
---|---|
Area | 1.9623164903218E+14 |
Altitude | 18435921.08295 |
Triangular Pyramid
Length = nSurface area | 1.9623164903218E+14 |
---|---|
Volume | 1.1369369416609E+21 |
Height | 10035244.353655 |