21312816
21,312,816 is an even composite number composed of five prime numbers multiplied together.
21312816 is an even composite number. It is composed of five distinct prime numbers multiplied together. It has a total of eighty divisors.
Prime factorization of 21312816:
24 × 3 × 7 × 137 × 463
(2 × 2 × 2 × 2 × 3 × 7 × 137 × 463)See below for interesting mathematical facts about the number 21312816 from the Numbermatics database.
Names of 21312816
- Cardinal: 21312816 can be written as Twenty-one million, three hundred twelve thousand, eight hundred sixteen.
Scientific notation
- Scientific notation: 2.1312816 × 107
Factors of 21312816
Divisors of 21312816
- Number of divisors d(n): 80
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Complete list of divisors:
1 2 3 4 6 7 8 12 14 16 21 24 28 42 48 56 84 112 137 168 274 336 411 463 548 822 926 959 1096 1389 1644 1852 1918 2192 2778 2877 3241 3288 3704 3836 5556 5754 6482 6576 7408 7672 9723 11112 11508 12964 15344 19446 22224 23016 25928 38892 46032 51856 63431 77784 126862 155568 190293 253724 380586 444017 507448 761172 888034 1014896 1332051 1522344 1776068 2664102 3044688 3552136 5328204 7104272 10656408 21312816
- Sum of all divisors σ(n): 63519744
- Sum of proper divisors (its aliquot sum) s(n): 42206928
- 21312816 is an abundant number, because the sum of its proper divisors (42206928) is greater than itself. Its abundance is 20894112
Bases of 21312816
- Binary: 10100010100110101001100002
- Hexadecimal: 0x1453530
- Base-36: COT2O
Squares and roots of 21312816
- 21312816 squared (213128162) is 454236125849856
- 21312816 cubed (213128163) is 9681050970790824554496
-
The
square root of 21312816 is 4616.5805527469 -
The
cube root of 21312816 is 277.2555691939
Scales and comparisons
How big is 21312816?- 21,312,816 seconds is equal to 35 weeks, 1 day, 16 hours, 13 minutes, 36 seconds.
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To count from 1 to 21,312,816 would take you about six days!
This is a very rough estimate, based on a speaking rate of half a second every third order of magnitude. If you speak quickly, you could probably say any randomly-chosen number between one and a thousand in around half a second. Very big numbers obviously take longer to say, so we add half a second for every extra x1000. (We do not count involuntary pauses, bathroom breaks or the necessity of sleep in our calculation!)
- A cube with a volume of 21312816 cubic inches would be around 23.1 feet tall.
Recreational maths with 21312816
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The information we have on file for 21312816 includes mathematical data and numerical statistics calculated using standard algorithms and methods. We are adding more all the time. If there are any features you would like to see, please contact us. Information provided for educational use, intellectual curiosity and fun!
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