21387207520
21,387,207,520 is an even composite number composed of six prime numbers multiplied together.
21387207520 is an even composite number. It is composed of six distinct prime numbers multiplied together. It has a total of one hundred ninety-two divisors.
Prime factorization of 21387207520:
25 × 5 × 7 × 31 × 331 × 1861
(2 × 2 × 2 × 2 × 2 × 5 × 7 × 31 × 331 × 1861)See below for interesting mathematical facts about the number 21387207520 from the Numbermatics database.
Names of 21387207520
- Cardinal: 21387207520 can be written as Twenty-one billion, three hundred eighty-seven million, two hundred seven thousand, five hundred twenty.
Scientific notation
- Scientific notation: 2.138720752 × 1010
Factors of 21387207520
Divisors of 21387207520
- Number of divisors d(n): 192
-
Complete list of divisors:
1 2 4 5 7 8 10 14 16 20 28 31 32 35 40 56 62 70 80 112 124 140 155 160 217 224 248 280 310 331 434 496 560 620 662 868 992 1085 1120 1240 1324 1655 1736 1861 2170 2317 2480 2648 3310 3472 3722 4340 4634 4960 5296 6620 6944 7444 8680 9268 9305 10261 10592 11585 13027 13240 14888 17360 18536 18610 20522 23170 26054 26480 29776 34720 37072 37220 41044 46340 51305 52108 52960 57691 59552 65135 71827 74144 74440 82088 92680 102610 104216 115382 130270 143654 148880 164176 185360 205220 208432 230764 260540 287308 288455 297760 328352 359135 370720 403837 410440 416864 461528 521080 574616 576910 615991 718270 807674 820880 923056 1042160 1149232 1153820 1231982 1436540 1615348 1641760 1846112 2019185 2084320 2298464 2307640 2463964 2873080 3079955 3230696 4038370 4311937 4615280 4927928 5746160 6159910 6461392 8076740 8623874 9230560 9855856 11492320 12319820 12922784 16153480 17247748 19095721 19711712 21559685 24639640 32306960 34495496 38191442 43119370 49279280 64613920 68990992 76382884 86238740 95478605 98558560 133670047 137981984 152765768 172477480 190957210 267340094 305531536 344954960 381914420 534680188 611063072 668350235 689909920 763828840 1069360376 1336700470 1527657680 2138720752 2673400940 3055315360 4277441504 5346801880 10693603760 21387207520
- Sum of all divisors σ(n): 59820429312
- Sum of proper divisors (its aliquot sum) s(n): 38433221792
- 21387207520 is an abundant number, because the sum of its proper divisors (38433221792) is greater than itself. Its abundance is 17046014272
Bases of 21387207520
- Binary: 100111110101100011011100011011000002
- Hexadecimal: 0x4FAC6E360
- Base-36: 9TPE2XS
Squares and roots of 21387207520
- 21387207520 squared (213872075202) is 457412645503544550400
- 21387207520 cubed (213872075203) is 9782779171656502194969899008000
-
The
square root of 21387207520 is 146243.6580505289 -
The
cube root of 21387207520 is 2775.7777770605
Scales and comparisons
How big is 21387207520?- 21,387,207,520 seconds is equal to 680 years, 2 weeks, 3 days, 2 hours, 58 minutes, 40 seconds.
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To count from 1 to 21,387,207,520 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 21387207520 cubic inches would be around 231.3 feet tall.
Recreational maths with 21387207520
- 21387207520 backwards is 02570278312
- The number of decimal digits it has is: 11
- The sum of 21387207520's digits is 37
- More coming soon!
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