21445920
21,445,920 is an even composite number composed of five prime numbers multiplied together.
21445920 is an even composite number. It is composed of five distinct prime numbers multiplied together. It has a total of one hundred forty-four divisors.
Prime factorization of 21445920:
25 × 32 × 5 × 53 × 281
(2 × 2 × 2 × 2 × 2 × 3 × 3 × 5 × 53 × 281)See below for interesting mathematical facts about the number 21445920 from the Numbermatics database.
Names of 21445920
- Cardinal: 21445920 can be written as Twenty-one million, four hundred forty-five thousand, nine hundred twenty.
Scientific notation
- Scientific notation: 2.144592 × 107
Factors of 21445920
Divisors of 21445920
- Number of divisors d(n): 144
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Complete list of divisors:
1 2 3 4 5 6 8 9 10 12 15 16 18 20 24 30 32 36 40 45 48 53 60 72 80 90 96 106 120 144 159 160 180 212 240 265 281 288 318 360 424 477 480 530 562 636 720 795 843 848 954 1060 1124 1272 1405 1440 1590 1686 1696 1908 2120 2248 2385 2529 2544 2810 3180 3372 3816 4215 4240 4496 4770 5058 5088 5620 6360 6744 7632 8430 8480 8992 9540 10116 11240 12645 12720 13488 14893 15264 16860 19080 20232 22480 25290 25440 26976 29786 33720 38160 40464 44679 44960 50580 59572 67440 74465 76320 80928 89358 101160 119144 134037 134880 148930 178716 202320 223395 238288 268074 297860 357432 404640 446790 476576 536148 595720 670185 714864 893580 1072296 1191440 1340370 1429728 1787160 2144592 2382880 2680740 3574320 4289184 5361480 7148640 10722960 21445920
- Sum of all divisors σ(n): 74830392
- Sum of proper divisors (its aliquot sum) s(n): 53384472
- 21445920 is an abundant number, because the sum of its proper divisors (53384472) is greater than itself. Its abundance is 31938552
Bases of 21445920
- Binary: 10100011100111101001000002
- Hexadecimal: 0x1473D20
- Base-36: CRNS0
Squares and roots of 21445920
- 21445920 squared (214459202) is 459927484646400
- 21445920 cubed (214459203) is 9863568041527922688000
-
The
square root of 21445920 is 4630.9739796289 -
The
cube root of 21445920 is 277.8315491757
Scales and comparisons
How big is 21445920?- 21,445,920 seconds is equal to 35 weeks, 3 days, 5 hours, 12 minutes.
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To count from 1 to 21,445,920 would take you about seven 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 21445920 cubic inches would be around 23.2 feet tall.
Recreational maths with 21445920
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The information we have on file for 21445920 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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