21331728990
21,331,728,990 is an even composite number composed of eight prime numbers multiplied together.
21331728990 is an even composite number. It is composed of eight distinct prime numbers multiplied together. It has a total of three hundred eighty-four divisors.
Prime factorization of 21331728990:
2 × 32 × 5 × 11 × 13 × 31 × 127 × 421
(2 × 3 × 3 × 5 × 11 × 13 × 31 × 127 × 421)See below for interesting mathematical facts about the number 21331728990 from the Numbermatics database.
Names of 21331728990
- Cardinal: 21331728990 can be written as Twenty-one billion, three hundred thirty-one million, seven hundred twenty-eight thousand, nine hundred ninety.
Scientific notation
- Scientific notation: 2.133172899 × 1010
Factors of 21331728990
Divisors of 21331728990
- Number of divisors d(n): 384
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Complete list of divisors:
1 2 3 5 6 9 10 11 13 15 18 22 26 30 31 33 39 45 55 62 65 66 78 90 93 99 110 117 127 130 143 155 165 186 195 198 234 254 279 286 310 330 341 381 390 403 421 429 465 495 558 585 635 682 715 762 806 842 858 930 990 1023 1143 1170 1209 1263 1270 1287 1395 1397 1430 1651 1705 1905 2015 2046 2105 2145 2286 2418 2526 2574 2790 2794 3069 3302 3410 3627 3789 3810 3937 4030 4191 4210 4290 4433 4631 4953 5115 5473 5715 6045 6138 6315 6435 6985 7254 7578 7874 8255 8382 8866 9262 9906 10230 10946 11430 11811 12090 12573 12630 12870 13051 13299 13893 13970 14859 15345 16419 16510 18135 18161 18945 19685 20955 22165 23155 23622 24765 25146 26102 26598 27365 27786 29718 30690 32838 35433 36270 36322 37890 39153 39370 39897 41679 41910 43307 44330 46310 49257 49530 51181 53467 54483 54730 59055 60203 62865 65255 66495 69465 70866 74295 78306 79794 82095 83358 86614 90805 98514 102362 106934 108966 117459 118110 120406 125730 129921 130510 132990 138930 143561 148590 153543 160401 163449 164190 169663 177165 180609 181610 195765 199485 208395 216535 234918 246285 255905 259842 267335 272415 287122 301015 307086 320802 326898 339326 354330 361218 389763 391530 398970 416790 430683 433070 460629 481203 492570 508989 511810 534670 541827 544830 562991 587295 588137 602030 649605 695071 717805 767715 779526 802005 817245 848315 861366 903045 921258 962406 1017978 1083654 1125982 1174590 1176274 1292049 1299210 1390142 1435610 1526967 1535430 1604010 1634490 1657477 1688973 1696630 1764411 1806090 1866293 1948815 2085213 2153415 2303145 2406015 2544945 2584098 2709135 2814955 2940685 3053934 3314954 3377946 3475355 3528822 3732586 3897630 4170426 4306830 4606290 4812030 4972431 5066919 5089890 5293233 5418270 5598879 5629910 5881370 6255639 6460245 6950710 7634835 7645781 8287385 8444865 8822055 9331465 9944862 10133838 10426065 10586466 11197758 12511278 12920490 14917293 15269670 15291562 16574770 16796637 16889730 17644110 18232247 18662930 20852130 21547201 22937343 24862155 25334595 26466165 27994395 29834586 31278195 33593274 36464494 38228905 43094402 45874686 49724310 50669190 52932330 54696741 55988790 62556390 64641603 68812029 74586465 76457810 83983185 91161235 107736005 109393482 114686715 129283206 137624058 149172930 164090223 167966370 182322470 193924809 215472010 229373430 237019211 273483705 323208015 328180446 344060145 387849618 474038422 546967410 646416030 688120290 711057633 820451115 969624045 1185096055 1422115266 1640902230 1939248090 2133172899 2370192110 3555288165 4266345798 7110576330 10665864495 21331728990
- Sum of all divisors σ(n): 67951263744
- Sum of proper divisors (its aliquot sum) s(n): 46619534754
- 21331728990 is an abundant number, because the sum of its proper divisors (46619534754) is greater than itself. Its abundance is 25287805764
Bases of 21331728990
- Binary: 100111101110111100001011010010111102
- Hexadecimal: 0x4F7785A5E
- Base-36: 9SSCZFI
Squares and roots of 21331728990
- 21331728990 squared (213317289902) is 455042661702806420100
- 21331728990 cubed (213317289903) is 9706846738332518476005288699000
-
The
square root of 21331728990 is 146053.8564708239 -
The
cube root of 21331728990 is 2773.3755713135
Scales and comparisons
How big is 21331728990?- 21,331,728,990 seconds is equal to 678 years, 14 weeks, 5 days, 16 minutes, 30 seconds.
-
To count from 1 to 21,331,728,990 would take you about one thousand, three hundred fifty-six 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 21331728990 cubic inches would be around 231.1 feet tall.
Recreational maths with 21331728990
- 21331728990 backwards is 09982713312
- 21331728990 is a
Harshad number . - The number of decimal digits it has is: 11
- The sum of 21331728990's digits is 45
- More coming soon!
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