21384090
21,384,090 is an even composite number composed of six prime numbers multiplied together.
21384090 is an even composite number. It is composed of six distinct prime numbers multiplied together. It has a total of one hundred forty-four divisors.
Prime factorization of 21384090:
2 × 32 × 5 × 72 × 13 × 373
(2 × 3 × 3 × 5 × 7 × 7 × 13 × 373)See below for interesting mathematical facts about the number 21384090 from the Numbermatics database.
Names of 21384090
- Cardinal: 21384090 can be written as Twenty-one million, three hundred eighty-four thousand and ninety.
Scientific notation
- Scientific notation: 2.138409 × 107
Factors of 21384090
Divisors of 21384090
- Number of divisors d(n): 144
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Complete list of divisors:
1 2 3 5 6 7 9 10 13 14 15 18 21 26 30 35 39 42 45 49 63 65 70 78 90 91 98 105 117 126 130 147 182 195 210 234 245 273 294 315 373 390 441 455 490 546 585 630 637 735 746 819 882 910 1119 1170 1274 1365 1470 1638 1865 1911 2205 2238 2611 2730 3185 3357 3730 3822 4095 4410 4849 5222 5595 5733 6370 6714 7833 8190 9555 9698 11190 11466 13055 14547 15666 16785 18277 19110 23499 24245 26110 28665 29094 33570 33943 36554 39165 43641 46998 48490 54831 57330 67886 72735 78330 87282 91385 101829 109662 117495 145470 164493 169715 182770 203658 218205 234990 237601 274155 305487 328986 339430 436410 475202 509145 548310 610974 712803 822465 1018290 1188005 1425606 1527435 1644930 2138409 2376010 3054870 3564015 4276818 7128030 10692045 21384090
- Sum of all divisors σ(n): 69837768
- Sum of proper divisors (its aliquot sum) s(n): 48453678
- 21384090 is an abundant number, because the sum of its proper divisors (48453678) is greater than itself. Its abundance is 27069588
Bases of 21384090
- Binary: 10100011001001011100110102
- Hexadecimal: 0x1464B9A
- Base-36: CQC2I
Squares and roots of 21384090
- 21384090 squared (213840902) is 457279305128100
- 21384090 cubed (213840903) is 9778501815996751929000
-
The
square root of 21384090 is 4624.2934595461 -
The
cube root of 21384090 is 277.5642899501
Scales and comparisons
How big is 21384090?- 21,384,090 seconds is equal to 35 weeks, 2 days, 12 hours, 1 minute, 30 seconds.
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To count from 1 to 21,384,090 would take you about six 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 21384090 cubic inches would be around 23.1 feet tall.
Recreational maths with 21384090
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