21021920
21,021,920 is an even composite number composed of five prime numbers multiplied together.
21021920 is an even composite number. It is composed of five distinct prime numbers multiplied together. It has a total of ninety-six divisors.
Prime factorization of 21021920:
25 × 5 × 37 × 53 × 67
(2 × 2 × 2 × 2 × 2 × 5 × 37 × 53 × 67)See below for interesting mathematical facts about the number 21021920 from the Numbermatics database.
Names of 21021920
- Cardinal: 21021920 can be written as Twenty-one million, twenty-one thousand, nine hundred twenty.
Scientific notation
- Scientific notation: 2.102192 × 107
Factors of 21021920
Divisors of 21021920
- Number of divisors d(n): 96
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Complete list of divisors:
1 2 4 5 8 10 16 20 32 37 40 53 67 74 80 106 134 148 160 185 212 265 268 296 335 370 424 530 536 592 670 740 848 1060 1072 1184 1340 1480 1696 1961 2120 2144 2479 2680 2960 3551 3922 4240 4958 5360 5920 7102 7844 8480 9805 9916 10720 12395 14204 15688 17755 19610 19832 24790 28408 31376 35510 39220 39664 49580 56816 62752 71020 78440 79328 99160 113632 131387 142040 156880 198320 262774 284080 313760 396640 525548 568160 656935 1051096 1313870 2102192 2627740 4204384 5255480 10510960 21021920
- Sum of all divisors σ(n): 52744608
- Sum of proper divisors (its aliquot sum) s(n): 31722688
- 21021920 is an abundant number, because the sum of its proper divisors (31722688) is greater than itself. Its abundance is 10700768
Bases of 21021920
- Binary: 10100000011000100111000002
- Hexadecimal: 0x140C4E0
- Base-36: CIKM8
Squares and roots of 21021920
- 21021920 squared (210219202) is 441921120486400
- 21021920 cubed (210219203) is 9290030441175461888000
-
The
square root of 21021920 is 4584.9667392469 -
The
cube root of 21021920 is 275.9883773023
Scales and comparisons
How big is 21021920?- 21,021,920 seconds is equal to 34 weeks, 5 days, 7 hours, 25 minutes, 20 seconds.
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To count from 1 to 21,021,920 would take you about twenty-three hours!
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 21021920 cubic inches would be around 23 feet tall.
Recreational maths with 21021920
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