21351990
21,351,990 is an even composite number composed of six prime numbers multiplied together.
21351990 is an even composite number. It is composed of six distinct prime numbers multiplied together. It has a total of sixty-four divisors.
Prime factorization of 21351990:
2 × 3 × 5 × 11 × 89 × 727
See below for interesting mathematical facts about the number 21351990 from the Numbermatics database.
Names of 21351990
- Cardinal: 21351990 can be written as Twenty-one million, three hundred fifty-one thousand, nine hundred ninety.
Scientific notation
- Scientific notation: 2.135199 × 107
Factors of 21351990
Divisors of 21351990
- Number of divisors d(n): 64
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Complete list of divisors:
1 2 3 5 6 10 11 15 22 30 33 55 66 89 110 165 178 267 330 445 534 727 890 979 1335 1454 1958 2181 2670 2937 3635 4362 4895 5874 7270 7997 9790 10905 14685 15994 21810 23991 29370 39985 47982 64703 79970 119955 129406 194109 239910 323515 388218 647030 711733 970545 1423466 1941090 2135199 3558665 4270398 7117330 10675995 21351990
- Sum of all divisors σ(n): 56609280
- Sum of proper divisors (its aliquot sum) s(n): 35257290
- 21351990 is an abundant number, because the sum of its proper divisors (35257290) is greater than itself. Its abundance is 13905300
Bases of 21351990
- Binary: 10100010111001110001101102
- Hexadecimal: 0x145CE36
- Base-36: CPNAU
Squares and roots of 21351990
- 21351990 squared (213519902) is 455907476960100
- 21351990 cubed (213519903) is 9734531888977285599000
-
The
square root of 21351990 is 4620.8213555601 -
The
cube root of 21351990 is 277.4253349971
Scales and comparisons
How big is 21351990?- 21,351,990 seconds is equal to 35 weeks, 2 days, 3 hours, 6 minutes, 30 seconds.
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To count from 1 to 21,351,990 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 21351990 cubic inches would be around 23.1 feet tall.
Recreational maths with 21351990
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The information we have on file for 21351990 includes mathematical data and numerical statistics calculated using standard algorithms and methods. We are adding more all the time. If there are any features you would like to see, please contact us. Information provided for educational use, intellectual curiosity and fun!
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