21491888 (number)
21491888 is an even 8-digits composite number following 21491887 and preceding 21491889. In scientific notation, it is written as 2.1491888 × 10^7. The sum of its digits is 41. It has a total of 7 prime factors and 40 positive divisors. There are 9253440 positive integers (up to 21491888) that are relatively prime to 21491888.
Interesting facts
- 21491888 has 40 divisors, whose sum is 47824320
- The reverse of 21491888 is 88819412
- Previous prime number is 11
Basic properties
- Is Prime? no
- Number parity even
- Number length 8
- Sum of Digits 41
- Digital Root 5
Name
Name | twenty-one million four hundred ninety-one thousand eight hundred eighty-eight |
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Notation
Scientific notation | 2.1491888 × 10^7 |
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Engineering notation | 2.1491888 × 10^6 |
Prime Factorization of 21491888
Prime Factorization 2 × 2 × 2 × 2 × 19 × 11 × 6427
Composite numberω | Distinct Factors | 4 | Total number of distinct prime factors |
---|---|---|---|
Ω | Total Factors | 7 | Total number of prime factors |
rad | Radical | 2686486 | Product of the distinct prime numbers |
The prime factorization of 21491888 is 2 × 2 × 2 × 2 × 19 × 11 × 6427. Since it has a total of 7 prime factors.
Most popular turbo-numbers
Basic calculations (n = 21491888)
Multiplication
n×yn×2 | 42983776 |
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n×3 | 64475664 |
n×4 | 85967552 |
n×5 | 107459440 |
Division
n÷yn÷2 | 10745944 |
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n÷3 | 7163962.6666667 |
n÷3 | 5372972 |
n÷5 | 4298377.6 |
Exponentiation
nyn2 | 461901249804544 |
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n3 | 9.9271299278593E+21 |
n4 | 2.13352764571E+29 |
n5 | 4.5853537206503E+36 |
Nth Root
y√n2√n | 4635.9344257657 |
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3√n | 278.02991241719 |
4√n | 68.087696581436 |
5√n | 29.272169666807 |
Divisors of 21491888
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 | -21491887 | 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 21491888 can be divided by 40 positive divisors. The sum of these divisors (counting 21491888) is 1, the average is 0.025.
Base conversion 21491888
Base | System | Value |
---|---|---|
2 | Binary | 1010001111111000010110000 |
3 | Ternary | 1111102220022212 |
4 | Quaternary | 1101333002300 |
5 | Quinary | 21000220023 |
6 | Senary | 2044351252 |
8 | Octal | 121770260 |
10 | Decimal | 21491888 |
12 | Duodecimal | 7245528 |
16 | Hexadecimal | 147f0b0 |
20 | Vigesimal | 6e69e8 |
36 | Base36 | csn8w |
Cryptographic Hash Functions
md5 | bacee7c524a38ae5bdde21f5091ecbae |
---|---|
sha1 | 71720328a8f935373d05290e79c6638624804fd9 |
sha256 | 0f346f29bbe49c4843a54d924717df3503ff99510f43bb7d7c5ea7aaab6aa2e9 |
sha512 | 9d1a7f1c7b6e7b32b8d706580a1a7ce3f60d966820725b0743eb7e9463a12f03b460f0c7b05611c0479da58209ca1b96baa25968144851b8e656a2b3f570fff4 |
ripemd-160 | 07e3925e9bdd3331ec1cc4615f1765963f90e0cb |
21491888 as geometric shapes
Circle
Radius = nDiameter | 42983776 |
---|---|
Circumference | 135037514.90515 |
Area | 1.4511055730699E+15 |
Sphere
Radius = nVolume | 4.1582664603459E+22 |
---|---|
Surface area | 5.8044222922796E+15 |
Circumference | 135037514.90515 |
Square
Length = nPerimeter | 85967552 |
---|---|
Area | 461901249804544 |
Diagonal | 30394119.490604 |
Cube
Length = nSurface area | 2771407498827264 |
---|---|
Volume | 9.9271299278593E+21 |
Space diagonal | 37225041.96658 |
Equilateral Triangle
Length = nPerimeter | 64475664 |
---|---|
Area | 2.0000910818526E+14 |
Altitude | 18612520.98329 |
Triangular Pyramid
Length = nSurface area | 2.0000910818526E+14 |
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Volume | 1.1699234816182E+21 |
Height | 10131373.163535 |