21206840
21,206,840 is an even composite number composed of five prime numbers multiplied together.
What does the number 21206840 look like?
This visualization shows the relationship between its 5 prime factors (large circles) and 64 divisors.
21206840 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 21206840:
23 × 5 × 41 × 67 × 193
(2 × 2 × 2 × 5 × 41 × 67 × 193)See below for interesting mathematical facts about the number 21206840 from the Numbermatics database.
Names of 21206840
- Cardinal: 21206840 can be written as Twenty-one million, two hundred six thousand, eight hundred forty.
Scientific notation
- Scientific notation: 2.120684 × 107
Factors of 21206840
Divisors of 21206840
- Number of divisors d(n): 64
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Complete list of divisors:
1 2 4 5 8 10 20 40 41 67 82 134 164 193 205 268 328 335 386 410 536 670 772 820 965 1340 1544 1640 1930 2680 2747 3860 5494 7720 7913 10988 12931 13735 15826 21976 25862 27470 31652 39565 51724 54940 63304 64655 79130 103448 109880 129310 158260 258620 316520 517240 530171 1060342 2120684 2650855 4241368 5301710 10603420 21206840
- Sum of all divisors σ(n): 49865760
- Sum of proper divisors (its aliquot sum) s(n): 28658920
- 21206840 is an abundant number, because the sum of its proper divisors (28658920) is greater than itself. Its abundance is 7452080
Bases of 21206840
- Binary: 10100001110010111001110002
- Hexadecimal: 0x1439738
- Base-36: CMJAW
Squares and roots of 21206840
- 21206840 squared (212068402) is 449730062785600
- 21206840 cubed (212068403) is 9537353484684173504000
-
The
square root of 21206840 is 4605.0884899207 -
The
cube root of 21206840 is 276.7952628745
Scales and comparisons
How big is 21206840?- 21,206,840 seconds is equal to 35 weeks, 10 hours, 47 minutes, 20 seconds.
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To count from 1 to 21,206,840 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 21206840 cubic inches would be around 23.1 feet tall.
Recreational maths with 21206840
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The information we have on file for 21206840 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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