21478018920
21,478,018,920 is an even composite number composed of seven prime numbers multiplied together.
21478018920 is an even composite number. It is composed of seven distinct prime numbers multiplied together. It has a total of two hundred fifty-six divisors.
Prime factorization of 21478018920:
23 × 3 × 5 × 31 × 41 × 53 × 2657
(2 × 2 × 2 × 3 × 5 × 31 × 41 × 53 × 2657)See below for interesting mathematical facts about the number 21478018920 from the Numbermatics database.
Names of 21478018920
- Cardinal: 21478018920 can be written as Twenty-one billion, four hundred seventy-eight million, eighteen thousand, nine hundred twenty.
Scientific notation
- Scientific notation: 2.147801892 × 1010
Factors of 21478018920
Divisors of 21478018920
- Number of divisors d(n): 256
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Complete list of divisors:
1 2 3 4 5 6 8 10 12 15 20 24 30 31 40 41 53 60 62 82 93 106 120 123 124 155 159 164 186 205 212 246 248 265 310 318 328 372 410 424 465 492 530 615 620 636 744 795 820 930 984 1060 1230 1240 1271 1272 1590 1640 1643 1860 2120 2173 2460 2542 2657 3180 3286 3720 3813 4346 4920 4929 5084 5314 6355 6360 6519 6572 7626 7971 8215 8692 9858 10168 10628 10865 12710 13038 13144 13285 15252 15942 16430 17384 19065 19716 21256 21730 24645 25420 26076 26570 30504 31884 32595 32860 38130 39432 39855 43460 49290 50840 52152 53140 63768 65190 65720 67363 76260 79710 82367 86920 98580 106280 108937 130380 134726 140821 152520 159420 164734 197160 202089 217874 247101 260760 269452 281642 318840 326811 329468 336815 404178 411835 422463 435748 494202 538904 544685 563284 653622 658936 673630 704105 808356 823670 844926 871496 988404 1010445 1089370 1126568 1235505 1307244 1347260 1408210 1616712 1634055 1647340 1689852 1976808 2020890 2112315 2178740 2471010 2614488 2694520 2816420 3268110 3294680 3377047 3379704 4041780 4224630 4357480 4365451 4942020 5632840 5773661 6536220 6754094 8083560 8449260 8730902 9884040 10131141 11547322 13072440 13096353 13508188 16885235 16898520 17320983 17461804 20262282 21827255 23094644 26192706 27016376 28868305 33770470 34641966 34923608 40524564 43654510 46189288 50655705 52385412 57736610 65481765 67540940 69283932 81049128 86604915 87309020 101311410 104770824 115473220 130963530 135081880 138567864 173209830 174618040 178983491 202622820 230946440 261927060 346419660 357966982 405245640 523854120 536950473 692839320 715933964 894917455 1073900946 1431867928 1789834910 2147801892 2684752365 3579669820 4295603784 5369504730 7159339640 10739009460 21478018920
- Sum of all divisors σ(n): 69446522880
- Sum of proper divisors (its aliquot sum) s(n): 47968503960
- 21478018920 is an abundant number, because the sum of its proper divisors (47968503960) is greater than itself. Its abundance is 26490485040
Bases of 21478018920
- Binary: 101000000000011000010001111011010002
- Hexadecimal: 0x500308F68
- Base-36: 9V7GHGO
Squares and roots of 21478018920
- 21478018920 squared (214780189202) is 461305296727877966400
- 21478018920 cubed (214780189203) is 9907923891017577053790324288000
-
The
square root of 21478018920 is 146553.8089576655 -
The
cube root of 21478018920 is 2779.7009374131
Scales and comparisons
How big is 21478018920?- 21,478,018,920 seconds is equal to 682 years, 48 weeks, 4 days, 4 hours, 22 minutes.
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To count from 1 to 21,478,018,920 would take you about one thousand, three hundred sixty-five 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 21478018920 cubic inches would be around 231.6 feet tall.
Recreational maths with 21478018920
- 21478018920 backwards is 02981087412
- The number of decimal digits it has is: 11
- The sum of 21478018920's digits is 42
- More coming soon!
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