21387031440
21,387,031,440 is an even composite number composed of six prime numbers multiplied together.
21387031440 is an even composite number. It is composed of six distinct prime numbers multiplied together. It has a total of one hundred sixty divisors.
Prime factorization of 21387031440:
24 × 3 × 5 × 31 × 599 × 4799
(2 × 2 × 2 × 2 × 3 × 5 × 31 × 599 × 4799)See below for interesting mathematical facts about the number 21387031440 from the Numbermatics database.
Names of 21387031440
- Cardinal: 21387031440 can be written as Twenty-one billion, three hundred eighty-seven million, thirty-one thousand, four hundred forty.
Scientific notation
- Scientific notation: 2.138703144 × 1010
Factors of 21387031440
Divisors of 21387031440
- Number of divisors d(n): 160
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Complete list of divisors:
1 2 3 4 5 6 8 10 12 15 16 20 24 30 31 40 48 60 62 80 93 120 124 155 186 240 248 310 372 465 496 599 620 744 930 1198 1240 1488 1797 1860 2396 2480 2995 3594 3720 4792 4799 5990 7188 7440 8985 9584 9598 11980 14376 14397 17970 18569 19196 23960 23995 28752 28794 35940 37138 38392 47920 47990 55707 57588 71880 71985 74276 76784 92845 95980 111414 115176 143760 143970 148552 148769 185690 191960 222828 230352 278535 287940 297104 297538 371380 383920 445656 446307 557070 575880 595076 742760 743845 891312 892614 1114140 1151760 1190152 1485520 1487690 1785228 2228280 2231535 2380304 2874601 2975380 3570456 4456560 4463070 5749202 5950760 7140912 8623803 8926140 11498404 11901520 14373005 17247606 17852280 22996808 28746010 34495212 35704560 43119015 45993616 57492020 68990424 86238030 89112631 114984040 137980848 172476060 178225262 229968080 267337893 344952120 356450524 445563155 534675786 689904240 712901048 891126310 1069351572 1336689465 1425802096 1782252620 2138703144 2673378930 3564505240 4277406288 5346757860 7129010480 10693515720 21387031440
- Sum of all divisors σ(n): 68567040000
- Sum of proper divisors (its aliquot sum) s(n): 47180008560
- 21387031440 is an abundant number, because the sum of its proper divisors (47180008560) is greater than itself. Its abundance is 25792977120
Bases of 21387031440
- Binary: 100111110101100010000110011100100002
- Hexadecimal: 0x4FAC43390
- Base-36: 9TPAB2O
Squares and roots of 21387031440
- 21387031440 squared (213870314402) is 457405113815548473600
- 21387031440 cubed (213870314403) is 9782537549989913565727209984000
-
The
square root of 21387031440 is 146243.0560402783 -
The
cube root of 21387031440 is 2775.7701594181
Scales and comparisons
How big is 21387031440?- 21,387,031,440 seconds is equal to 680 years, 2 weeks, 1 day, 2 hours, 4 minutes.
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To count from 1 to 21,387,031,440 would take you about one thousand, three hundred sixty years!
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 21387031440 cubic inches would be around 231.3 feet tall.
Recreational maths with 21387031440
- 21387031440 backwards is 04413078312
- The number of decimal digits it has is: 11
- The sum of 21387031440's digits is 33
- More coming soon!
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