21520900
21,520,900 is an even composite number composed of five prime numbers multiplied together.
21520900 is an even composite number. It is composed of five distinct prime numbers multiplied together. It has a total of seventy-two divisors.
Prime factorization of 21520900:
22 × 52 × 29 × 41 × 181
(2 × 2 × 5 × 5 × 29 × 41 × 181)See below for interesting mathematical facts about the number 21520900 from the Numbermatics database.
Names of 21520900
- Cardinal: 21520900 can be written as Twenty-one million, five hundred twenty thousand, nine hundred.
Scientific notation
- Scientific notation: 2.15209 × 107
Factors of 21520900
Divisors of 21520900
- Number of divisors d(n): 72
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Complete list of divisors:
1 2 4 5 10 20 25 29 41 50 58 82 100 116 145 164 181 205 290 362 410 580 724 725 820 905 1025 1189 1450 1810 2050 2378 2900 3620 4100 4525 4756 5249 5945 7421 9050 10498 11890 14842 18100 20996 23780 26245 29684 29725 37105 52490 59450 74210 104980 118900 131225 148420 185525 215209 262450 371050 430418 524900 742100 860836 1076045 2152090 4304180 5380225 10760450 21520900
- Sum of all divisors σ(n): 49762440
- Sum of proper divisors (its aliquot sum) s(n): 28241540
- 21520900 is an abundant number, because the sum of its proper divisors (28241540) is greater than itself. Its abundance is 6720640
Bases of 21520900
- Binary: 10100100001100010000001002
- Hexadecimal: 0x1486204
- Base-36: CT9MS
Squares and roots of 21520900
- 21520900 squared (215209002) is 463149136810000
- 21520900 cubed (215209003) is 9967386258374329000000
-
The
square root of 21520900 is 4639.0624052711 -
The
cube root of 21520900 is 278.1549607921
Scales and comparisons
How big is 21520900?- 21,520,900 seconds is equal to 35 weeks, 4 days, 2 hours, 1 minute, 40 seconds.
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To count from 1 to 21,520,900 would take you about two 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 21520900 cubic inches would be around 23.2 feet tall.
Recreational maths with 21520900
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The information we have on file for 21520900 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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