21385980
21,385,980 is an even composite number composed of six prime numbers multiplied together.
21385980 is an even composite number. It is composed of six distinct prime numbers multiplied together. It has a total of one hundred forty-four divisors.
Prime factorization of 21385980:
22 × 32 × 5 × 7 × 11 × 1543
(2 × 2 × 3 × 3 × 5 × 7 × 11 × 1543)See below for interesting mathematical facts about the number 21385980 from the Numbermatics database.
Names of 21385980
- Cardinal: 21385980 can be written as Twenty-one million, three hundred eighty-five thousand, nine hundred eighty.
Scientific notation
- Scientific notation: 2.138598 × 107
Factors of 21385980
Divisors of 21385980
- Number of divisors d(n): 144
-
Complete list of divisors:
1 2 3 4 5 6 7 9 10 11 12 14 15 18 20 21 22 28 30 33 35 36 42 44 45 55 60 63 66 70 77 84 90 99 105 110 126 132 140 154 165 180 198 210 220 231 252 308 315 330 385 396 420 462 495 630 660 693 770 924 990 1155 1260 1386 1540 1543 1980 2310 2772 3086 3465 4620 4629 6172 6930 7715 9258 10801 13860 13887 15430 16973 18516 21602 23145 27774 30860 32403 33946 43204 46290 50919 54005 55548 64806 67892 69435 84865 92580 97209 101838 108010 118811 129612 138870 152757 162015 169730 194418 203676 216020 237622 254595 277740 305514 324030 339460 356433 388836 475244 486045 509190 594055 611028 648060 712866 763785 972090 1018380 1069299 1188110 1425732 1527570 1782165 1944180 2138598 2376220 3055140 3564330 4277196 5346495 7128660 10692990 21385980
- Sum of all divisors σ(n): 80930304
- Sum of proper divisors (its aliquot sum) s(n): 59544324
- 21385980 is an abundant number, because the sum of its proper divisors (59544324) is greater than itself. Its abundance is 38158344
Bases of 21385980
- Binary: 10100011001010010111111002
- Hexadecimal: 0x14652FC
- Base-36: CQDJ0
Squares and roots of 21385980
- 21385980 squared (213859802) is 457360140560400
- 21385980 cubed (213859803) is 9781094818821903192000
-
The
square root of 21385980 is 4624.4978105735 -
The
cube root of 21385980 is 277.5724670735
Scales and comparisons
How big is 21385980?- 21,385,980 seconds is equal to 35 weeks, 2 days, 12 hours, 33 minutes.
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To count from 1 to 21,385,980 would take you about six 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 21385980 cubic inches would be around 23.1 feet tall.
Recreational maths with 21385980
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The information we have on file for 21385980 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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