21312990
21,312,990 is an even composite number composed of five prime numbers multiplied together.
21312990 is an even composite number. It is composed of five distinct prime numbers multiplied together. It has a total of sixty-four divisors.
Prime factorization of 21312990:
2 × 33 × 5 × 193 × 409
(2 × 3 × 3 × 3 × 5 × 193 × 409)See below for interesting mathematical facts about the number 21312990 from the Numbermatics database.
Names of 21312990
- Cardinal: 21312990 can be written as Twenty-one million, three hundred twelve thousand, nine hundred ninety.
Scientific notation
- Scientific notation: 2.131299 × 107
Factors of 21312990
Divisors of 21312990
- Number of divisors d(n): 64
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Complete list of divisors:
1 2 3 5 6 9 10 15 18 27 30 45 54 90 135 193 270 386 409 579 818 965 1158 1227 1737 1930 2045 2454 2895 3474 3681 4090 5211 5790 6135 7362 8685 10422 11043 12270 17370 18405 22086 26055 36810 52110 55215 78937 110430 157874 236811 394685 473622 710433 789370 1184055 1420866 2131299 2368110 3552165 4262598 7104330 10656495 21312990
- Sum of all divisors σ(n): 57268800
- Sum of proper divisors (its aliquot sum) s(n): 35955810
- 21312990 is an abundant number, because the sum of its proper divisors (35955810) is greater than itself. Its abundance is 14642820
Bases of 21312990
- Binary: 10100010100110101110111102
- Hexadecimal: 0x14535DE
- Base-36: COT7I
Squares and roots of 21312990
- 21312990 squared (213129902) is 454243542740100
- 21312990 cubed (213129903) is 9681288083984323899000
-
The
square root of 21312990 is 4616.5993978251 -
The
cube root of 21312990 is 277.2563237061
Scales and comparisons
How big is 21312990?- 21,312,990 seconds is equal to 35 weeks, 1 day, 16 hours, 16 minutes, 30 seconds.
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To count from 1 to 21,312,990 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 21312990 cubic inches would be around 23.1 feet tall.
Recreational maths with 21312990
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The information we have on file for 21312990 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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