21078420
21,078,420 is an even composite number composed of six prime numbers multiplied together.
21078420 is an even composite number. It is composed of six distinct prime numbers multiplied together. It has a total of ninety-six divisors.
Prime factorization of 21078420:
22 × 3 × 5 × 11 × 109 × 293
(2 × 2 × 3 × 5 × 11 × 109 × 293)See below for interesting mathematical facts about the number 21078420 from the Numbermatics database.
Names of 21078420
- Cardinal: 21078420 can be written as Twenty-one million, seventy-eight thousand, four hundred twenty.
Scientific notation
- Scientific notation: 2.107842 × 107
Factors of 21078420
Divisors of 21078420
- Number of divisors d(n): 96
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Complete list of divisors:
1 2 3 4 5 6 10 11 12 15 20 22 30 33 44 55 60 66 109 110 132 165 218 220 293 327 330 436 545 586 654 660 879 1090 1172 1199 1308 1465 1635 1758 2180 2398 2930 3223 3270 3516 3597 4395 4796 5860 5995 6446 6540 7194 8790 9669 11990 12892 14388 16115 17580 17985 19338 23980 31937 32230 35970 38676 48345 63874 64460 71940 95811 96690 127748 159685 191622 193380 319370 351307 383244 479055 638740 702614 958110 1053921 1405228 1756535 1916220 2107842 3513070 4215684 5269605 7026140 10539210 21078420
- Sum of all divisors σ(n): 65197440
- Sum of proper divisors (its aliquot sum) s(n): 44119020
- 21078420 is an abundant number, because the sum of its proper divisors (44119020) is greater than itself. Its abundance is 23040600
Bases of 21078420
- Binary: 10100000110100001100101002
- Hexadecimal: 0x141A194
- Base-36: CJS7O
Squares and roots of 21078420
- 21078420 squared (210784202) is 444299789696400
- 21078420 cubed (210784203) is 9365137573132391688000
-
The
square root of 21078420 is 4591.1240453727 -
The
cube root of 21078420 is 276.2354114175
Scales and comparisons
How big is 21078420?- 21,078,420 seconds is equal to 34 weeks, 5 days, 23 hours, 7 minutes.
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To count from 1 to 21,078,420 would take you about twenty-two 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 21078420 cubic inches would be around 23 feet tall.
Recreational maths with 21078420
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