21618972
21,618,972 is an even composite number composed of five prime numbers multiplied together.
21618972 is an even composite number. It is composed of five distinct prime numbers multiplied together. It has a total of seventy-two divisors.
Prime factorization of 21618972:
22 × 32 × 41 × 97 × 151
(2 × 2 × 3 × 3 × 41 × 97 × 151)See below for interesting mathematical facts about the number 21618972 from the Numbermatics database.
Names of 21618972
- Cardinal: 21618972 can be written as Twenty-one million, six hundred eighteen thousand, nine hundred seventy-two.
Scientific notation
- Scientific notation: 2.1618972 × 107
Factors of 21618972
Divisors of 21618972
- Number of divisors d(n): 72
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Complete list of divisors:
1 2 3 4 6 9 12 18 36 41 82 97 123 151 164 194 246 291 302 369 388 453 492 582 604 738 873 906 1164 1359 1476 1746 1812 2718 3492 3977 5436 6191 7954 11931 12382 14647 15908 18573 23862 24764 29294 35793 37146 43941 47724 55719 58588 71586 74292 87882 111438 131823 143172 175764 222876 263646 527292 600527 1201054 1801581 2402108 3603162 5404743 7206324 10809486 21618972
- Sum of all divisors σ(n): 56932512
- Sum of proper divisors (its aliquot sum) s(n): 35313540
- 21618972 is an abundant number, because the sum of its proper divisors (35313540) is greater than itself. Its abundance is 13694568
Bases of 21618972
- Binary: 10100100111100001000111002
- Hexadecimal: 0x149E11C
- Base-36: CVDB0
Squares and roots of 21618972
- 21618972 squared (216189722) is 467379950336784
- 21618972 cubed (216189723) is 10104274059692323866048
-
The
square root of 21618972 is 4649.6206296859 -
The
cube root of 21618972 is 278.5768434001
Scales and comparisons
How big is 21618972?- 21,618,972 seconds is equal to 35 weeks, 5 days, 5 hours, 16 minutes, 12 seconds.
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To count from 1 to 21,618,972 would take you about four 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 21618972 cubic inches would be around 23.2 feet tall.
Recreational maths with 21618972
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The information we have on file for 21618972 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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