21491920 (number)
21491920 is an even 8-digits composite number following 21491919 and preceding 21491921. In scientific notation, it is written as 2.1491920 × 10^7. The sum of its digits is 28. It has a total of 7 prime factors and 40 positive divisors. There are 8552448 positive integers (up to 21491920) that are relatively prime to 21491920.
Interesting facts
- 21491920 has 40 divisors, whose sum is 50226696
- The reverse of 21491920 is 02919412
- Previous prime number is 1153
Basic properties
- Is Prime? no
- Number parity even
- Number length 8
- Sum of Digits 28
- Digital Root 1
Name
| Name | twenty-one million four hundred ninety-one thousand nine hundred twenty |
|---|
Notation
| Scientific notation | 2.1491920 × 10^7 |
|---|---|
| Engineering notation | 2.1491920 × 10^6 |
Prime Factorization of 21491920
Prime Factorization 2 × 2 × 2 × 2 × 5 × 1153 × 233
Composite number| ω | Distinct Factors | 4 | Total number of distinct prime factors |
|---|---|---|---|
| Ω | Total Factors | 7 | Total number of prime factors |
| rad | Radical | 2686490 | Product of the distinct prime numbers |
The prime factorization of 21491920 is 2 × 2 × 2 × 2 × 5 × 1153 × 233. Since it has a total of 7 prime factors.
Most popular turbo-numbers
Basic calculations (n = 21491920)
Multiplication
n×y| n×2 | 42983840 |
|---|---|
| n×3 | 64475760 |
| n×4 | 85967680 |
| n×5 | 107459600 |
Division
n÷y| n÷2 | 10745960 |
|---|---|
| n÷3 | 7163973.3333333 |
| n÷3 | 5372980 |
| n÷5 | 4298384 |
Exponentiation
ny| n2 | 461902625286400 |
|---|---|
| n3 | 9.9271742704453E+21 |
| n4 | 2.1335403524647E+29 |
| n5 | 4.5853878571943E+36 |
Nth Root
y√n| 2√n | 4635.9378770644 |
|---|---|
| 3√n | 278.0300504065 |
| 4√n | 68.087721925942 |
| 5√n | 29.272178383667 |
Divisors of 21491920
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 | -21491919 | 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 21491920 can be divided by 40 positive divisors. The sum of these divisors (counting 21491920) is 1, the average is 0.025.
Base conversion 21491920
| Base | System | Value |
|---|---|---|
| 2 | Binary | 1010001111111000011010000 |
| 3 | Ternary | 1111102220101001 |
| 4 | Quaternary | 1101333003100 |
| 5 | Quinary | 21000220140 |
| 6 | Senary | 2044351344 |
| 8 | Octal | 121770320 |
| 10 | Decimal | 21491920 |
| 12 | Duodecimal | 7245554 |
| 16 | Hexadecimal | 147f0d0 |
| 20 | Vigesimal | 6e69g0 |
| 36 | Base36 | csn9s |
Cryptographic Hash Functions
| md5 | 2e67bf95877d982068f6e007a87bba11 |
|---|---|
| sha1 | 120a5bb46a9269904afaceee463c4a75fdd342d5 |
| sha256 | 0105afbb87bda141955d7b31abbeb90dbd7732e929061338aba2eeef7e237258 |
| sha512 | 943cd6dbfe04c1c9440e5d071e4a1f51b249f161a42162ae1f0e04f62b8576cadb453f479b63dccd606d80d67070ac53ff1673862730e6e749e0a4bdd88128b0 |
| ripemd-160 | 73ca708bff206b7d2718871fc3ebfe5cae45464a |
21491920 as geometric shapes
Circle
Radius = n| Diameter | 42983840 |
|---|---|
| Circumference | 135037715.96708 |
| Area | 1.4511098942736E+15 |
Sphere
Radius = n| Volume | 4.1582850345249E+22 |
|---|---|
| Surface area | 5.8044395770944E+15 |
| Circumference | 135037715.96708 |
Square
Length = n| Perimeter | 85967680 |
|---|---|
| Area | 461902625286400 |
| Diagonal | 30394164.745438 |
Cube
Length = n| Surface area | 2771415751718400 |
|---|---|
| Volume | 9.9271742704453E+21 |
| Space diagonal | 37225097.392206 |
Equilateral Triangle
Length = n| Perimeter | 64475760 |
|---|---|
| Area | 2.0000970378637E+14 |
| Altitude | 18612548.696103 |
Triangular Pyramid
Length = n| Surface area | 2.0000970378637E+14 |
|---|---|
| Volume | 1.1699287074421E+21 |
| Height | 10131388.248479 |