21291920
21,291,920 is an even composite number composed of five prime numbers multiplied together.
21291920 is an even composite number. It is composed of five distinct prime numbers multiplied together. It has a total of eighty divisors.
Prime factorization of 21291920:
24 × 5 × 13 × 59 × 347
(2 × 2 × 2 × 2 × 5 × 13 × 59 × 347)See below for interesting mathematical facts about the number 21291920 from the Numbermatics database.
Names of 21291920
- Cardinal: 21291920 can be written as Twenty-one million, two hundred ninety-one thousand, nine hundred twenty.
Scientific notation
- Scientific notation: 2.129192 × 107
Factors of 21291920
Divisors of 21291920
- Number of divisors d(n): 80
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Complete list of divisors:
1 2 4 5 8 10 13 16 20 26 40 52 59 65 80 104 118 130 208 236 260 295 347 472 520 590 694 767 944 1040 1180 1388 1534 1735 2360 2776 3068 3470 3835 4511 4720 5552 6136 6940 7670 9022 12272 13880 15340 18044 20473 22555 27760 30680 36088 40946 45110 61360 72176 81892 90220 102365 163784 180440 204730 266149 327568 360880 409460 532298 818920 1064596 1330745 1637840 2129192 2661490 4258384 5322980 10645960 21291920
- Sum of all divisors σ(n): 54371520
- Sum of proper divisors (its aliquot sum) s(n): 33079600
- 21291920 is an abundant number, because the sum of its proper divisors (33079600) is greater than itself. Its abundance is 11787680
Bases of 21291920
- Binary: 10100010011100011100100002
- Hexadecimal: 0x144E390
- Base-36: COCY8
Squares and roots of 21291920
- 21291920 squared (212919202) is 453345857286400
- 21291920 cubed (212919203) is 9652603725673445888000
-
The
square root of 21291920 is 4614.3168508459 -
The
cube root of 21291920 is 277.1649284761
Scales and comparisons
How big is 21291920?- 21,291,920 seconds is equal to 35 weeks, 1 day, 10 hours, 25 minutes, 20 seconds.
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To count from 1 to 21,291,920 would take you about five 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 21291920 cubic inches would be around 23.1 feet tall.
Recreational maths with 21291920
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The information we have on file for 21291920 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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