20913840
20,913,840 is an even composite number composed of five prime numbers multiplied together.
20913840 is an even composite number. It is composed of five distinct prime numbers multiplied together. It has a total of one hundred twenty divisors.
Prime factorization of 20913840:
24 × 32 × 5 × 31 × 937
(2 × 2 × 2 × 2 × 3 × 3 × 5 × 31 × 937)See below for interesting mathematical facts about the number 20913840 from the Numbermatics database.
Names of 20913840
- Cardinal: 20913840 can be written as Twenty million, nine hundred thirteen thousand, eight hundred forty.
Scientific notation
- Scientific notation: 2.091384 × 107
Factors of 20913840
Divisors of 20913840
- Number of divisors d(n): 120
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Complete list of divisors:
1 2 3 4 5 6 8 9 10 12 15 16 18 20 24 30 31 36 40 45 48 60 62 72 80 90 93 120 124 144 155 180 186 240 248 279 310 360 372 465 496 558 620 720 744 930 937 1116 1240 1395 1488 1860 1874 2232 2480 2790 2811 3720 3748 4464 4685 5580 5622 7440 7496 8433 9370 11160 11244 14055 14992 16866 18740 22320 22488 28110 29047 33732 37480 42165 44976 56220 58094 67464 74960 84330 87141 112440 116188 134928 145235 168660 174282 224880 232376 261423 290470 337320 348564 435705 464752 522846 580940 674640 697128 871410 1045692 1161880 1307115 1394256 1742820 2091384 2323760 2614230 3485640 4182768 5228460 6971280 10456920 20913840
- Sum of all divisors σ(n): 72578688
- Sum of proper divisors (its aliquot sum) s(n): 51664848
- 20913840 is an abundant number, because the sum of its proper divisors (51664848) is greater than itself. Its abundance is 30751008
Bases of 20913840
- Binary: 10011111100011110101100002
- Hexadecimal: 0x13F1EB0
- Base-36: CG980
Squares and roots of 20913840
- 20913840 squared (209138402) is 437388703545600
- 20913840 cubed (209138403) is 9147477363760111104000
-
The
square root of 20913840 is 4573.1652058503 -
The
cube root of 20913840 is 275.5145847091
Scales and comparisons
How big is 20913840?- 20,913,840 seconds is equal to 34 weeks, 4 days, 1 hour, 24 minutes.
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To count from 1 to 20,913,840 would take you about fifty-one weeks!
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 20913840 cubic inches would be around 23 feet tall.
Recreational maths with 20913840
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The information we have on file for 20913840 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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