21721920
21,721,920 is an even composite number composed of five prime numbers multiplied together.
21721920 is an even composite number. It is composed of five distinct prime numbers multiplied together. It has a total of two hundred twenty-four divisors.
Prime factorization of 21721920:
26 × 3 × 5 × 113 × 17
(2 × 2 × 2 × 2 × 2 × 2 × 3 × 5 × 11 × 11 × 11 × 17)See below for interesting mathematical facts about the number 21721920 from the Numbermatics database.
Names of 21721920
- Cardinal: 21721920 can be written as Twenty-one million, seven hundred twenty-one thousand, nine hundred twenty.
Scientific notation
- Scientific notation: 2.172192 × 107
Factors of 21721920
Divisors of 21721920
- Number of divisors d(n): 224
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Complete list of divisors:
1 2 3 4 5 6 8 10 11 12 15 16 17 20 22 24 30 32 33 34 40 44 48 51 55 60 64 66 68 80 85 88 96 102 110 120 121 132 136 160 165 170 176 187 192 204 220 240 242 255 264 272 320 330 340 352 363 374 408 440 480 484 510 528 544 561 605 660 680 704 726 748 816 880 935 960 968 1020 1056 1088 1122 1210 1320 1331 1360 1452 1496 1632 1760 1815 1870 1936 2040 2057 2112 2244 2420 2640 2662 2720 2805 2904 2992 3264 3520 3630 3740 3872 3993 4080 4114 4488 4840 5280 5324 5440 5610 5808 5984 6171 6655 7260 7480 7744 7986 8160 8228 8976 9680 10285 10560 10648 11220 11616 11968 12342 13310 14520 14960 15972 16320 16456 17952 19360 19965 20570 21296 22440 22627 23232 24684 26620 29040 29920 30855 31944 32912 35904 38720 39930 41140 42592 44880 45254 49368 53240 58080 59840 61710 63888 65824 67881 79860 82280 85184 89760 90508 98736 106480 113135 116160 123420 127776 131648 135762 159720 164560 179520 181016 197472 212960 226270 246840 255552 271524 319440 329120 339405 362032 394944 425920 452540 493680 543048 638880 658240 678810 724064 905080 987360 1086096 1277760 1357620 1448128 1810160 1974720 2172192 2715240 3620320 4344384 5430480 7240640 10860960 21721920
- Sum of all divisors σ(n): 80320896
- Sum of proper divisors (its aliquot sum) s(n): 58598976
- 21721920 is an abundant number, because the sum of its proper divisors (58598976) is greater than itself. Its abundance is 36877056
Bases of 21721920
- Binary: 10100101101110011010000002
- Hexadecimal: 0x14B7340
- Base-36: CXKQO
Squares and roots of 21721920
- 21721920 squared (217219202) is 471841808486400
- 21721920 cubed (217219203) is 10249310016596901888000
-
The
square root of 21721920 is 4660.6780622567 -
The
cube root of 21721920 is 279.0183310369
Scales and comparisons
How big is 21721920?- 21,721,920 seconds is equal to 35 weeks, 6 days, 9 hours, 52 minutes.
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To count from 1 to 21,721,920 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 21721920 cubic inches would be around 23.3 feet tall.
Recreational maths with 21721920
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"Number 21721920 - Facts about the integer". Numbermatics.com. 2024. Web. 17 May 2024.
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Numbermatics. (2024). Number 21721920 - Facts about the integer. Retrieved 17 May 2024, from https://numbermatics.com/n/21721920/
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