21391760
21,391,760 is an even composite number composed of five prime numbers multiplied together.
21391760 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 21391760:
24 × 5 × 13 × 67 × 307
(2 × 2 × 2 × 2 × 5 × 13 × 67 × 307)See below for interesting mathematical facts about the number 21391760 from the Numbermatics database.
Names of 21391760
- Cardinal: 21391760 can be written as Twenty-one million, three hundred ninety-one thousand, seven hundred sixty.
Scientific notation
- Scientific notation: 2.139176 × 107
Factors of 21391760
Divisors of 21391760
- 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 65 67 80 104 130 134 208 260 268 307 335 520 536 614 670 871 1040 1072 1228 1340 1535 1742 2456 2680 3070 3484 3991 4355 4912 5360 6140 6968 7982 8710 12280 13936 15964 17420 19955 20569 24560 31928 34840 39910 41138 63856 69680 79820 82276 102845 159640 164552 205690 267397 319280 329104 411380 534794 822760 1069588 1336985 1645520 2139176 2673970 4278352 5347940 10695880 21391760
- Sum of all divisors σ(n): 54538176
- Sum of proper divisors (its aliquot sum) s(n): 33146416
- 21391760 is an abundant number, because the sum of its proper divisors (33146416) is greater than itself. Its abundance is 11754656
Bases of 21391760
- Binary: 10100011001101001100100002
- Hexadecimal: 0x1466990
- Base-36: CQHZK
Squares and roots of 21391760
- 21391760 squared (213917602) is 457607395897600
- 21391760 cubed (213917603) is 9789027587266443776000
-
The
square root of 21391760 is 4625.1227010751 -
The
cube root of 21391760 is 277.5974713731
Scales and comparisons
How big is 21391760?- 21,391,760 seconds is equal to 35 weeks, 2 days, 14 hours, 9 minutes, 20 seconds.
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To count from 1 to 21,391,760 would take you about nine 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 21391760 cubic inches would be around 23.1 feet tall.
Recreational maths with 21391760
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The information we have on file for 21391760 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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