21003890720
21,003,890,720 is an even composite number composed of five prime numbers multiplied together.
21003890720 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 21003890720:
25 × 5 × 23 × 557 × 10247
(2 × 2 × 2 × 2 × 2 × 5 × 23 × 557 × 10247)See below for interesting mathematical facts about the number 21003890720 from the Numbermatics database.
Names of 21003890720
- Cardinal: 21003890720 can be written as Twenty-one billion, three million, eight hundred ninety thousand, seven hundred twenty.
Scientific notation
- Scientific notation: 2.100389072 × 1010
Factors of 21003890720
Divisors of 21003890720
- Number of divisors d(n): 96
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Complete list of divisors:
1 2 4 5 8 10 16 20 23 32 40 46 80 92 115 160 184 230 368 460 557 736 920 1114 1840 2228 2785 3680 4456 5570 8912 10247 11140 12811 17824 20494 22280 25622 40988 44560 51235 51244 64055 81976 89120 102470 102488 128110 163952 204940 204976 235681 256220 327904 409880 409952 471362 512440 819760 942724 1024880 1178405 1639520 1885448 2049760 2356810 3770896 4713620 5707579 7541792 9427240 11415158 18854480 22830316 28537895 37708960 45660632 57075790 91321264 114151580 131274317 182642528 228303160 262548634 456606320 525097268 656371585 913212640 1050194536 1312743170 2100389072 2625486340 4200778144 5250972680 10501945360 21003890720
- Sum of all divisors σ(n): 51877179648
- Sum of proper divisors (its aliquot sum) s(n): 30873288928
- 21003890720 is an abundant number, because the sum of its proper divisors (30873288928) is greater than itself. Its abundance is 9869398208
Bases of 21003890720
- Binary: 100111000111110110111110000001000002
- Hexadecimal: 0x4E3EDF020
- Base-36: 9ND69SW
Squares and roots of 21003890720
- 21003890720 squared (210038907202) is 441163425377702118400
- 21003890720 cubed (210038907203) is 9266148376294130019586101248000
-
The
square root of 21003890720 is 144927.1910995311 -
The
cube root of 21003890720 is 2759.0945500101
Scales and comparisons
How big is 21003890720?- 21,003,890,720 seconds is equal to 667 years, 44 weeks, 4 days, 14 hours, 5 minutes, 20 seconds.
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To count from 1 to 21,003,890,720 would take you about one thousand, three hundred thirty-five years!
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 21003890720 cubic inches would be around 229.9 feet tall.
Recreational maths with 21003890720
- 21003890720 backwards is 02709830012
- 21003890720 is a
Harshad number . - The number of decimal digits it has is: 11
- The sum of 21003890720's digits is 32
- More coming soon!
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