21381204390
21,381,204,390 is an even composite number composed of eight prime numbers multiplied together.
21381204390 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 21381204390:
2 × 3 × 5 × 72 × 13 × 29 × 41 × 941
(2 × 3 × 5 × 7 × 7 × 13 × 29 × 41 × 941)See below for interesting mathematical facts about the number 21381204390 from the Numbermatics database.
Names of 21381204390
- Cardinal: 21381204390 can be written as Twenty-one billion, three hundred eighty-one million, two hundred four thousand, three hundred ninety.
Scientific notation
- Scientific notation: 2.138120439 × 1010
Factors of 21381204390
Divisors of 21381204390
- Number of divisors d(n): 384
-
Complete list of divisors:
1 2 3 5 6 7 10 13 14 15 21 26 29 30 35 39 41 42 49 58 65 70 78 82 87 91 98 105 123 130 145 147 174 182 195 203 205 210 245 246 273 287 290 294 377 390 406 410 435 455 490 533 546 574 609 615 637 735 754 861 870 910 941 1015 1066 1131 1189 1218 1230 1274 1365 1421 1435 1470 1599 1722 1882 1885 1911 2009 2030 2262 2378 2639 2665 2730 2823 2842 2870 3045 3185 3198 3567 3731 3770 3822 4018 4263 4305 4705 5278 5330 5646 5655 5945 6027 6090 6370 6587 7105 7134 7462 7917 7995 8323 8526 8610 9410 9555 10045 11193 11310 11890 12054 12233 13174 13195 14115 14210 15457 15834 15990 16646 17835 18473 18655 19110 19761 20090 21315 22386 24466 24969 26117 26390 27289 28230 30135 30914 32935 35670 36699 36946 37310 38581 39522 39585 41615 42630 46109 46371 49938 52234 54578 55419 55965 58261 60270 61165 65870 73398 77162 77285 78351 79170 81867 83230 85631 92218 92365 92742 98805 108199 110838 111930 115743 116522 122330 124845 130585 136445 138327 154570 156702 163734 171262 174783 183495 184730 191023 192905 197610 216398 230545 231486 231855 249690 256893 261170 270067 272890 276654 277095 291305 324597 349566 354757 366990 382046 385810 391755 409335 428155 461090 463710 501553 513786 540134 540995 554190 573069 578715 582610 599417 649194 691635 709514 757393 783510 810201 818670 856310 873915 955115 1003106 1064271 1081990 1118849 1146138 1157430 1198834 1284465 1337161 1350335 1383270 1504659 1514786 1620402 1622985 1747830 1773785 1798251 1890469 1910230 2128542 2237698 2272179 2483299 2507765 2568930 2674322 2700670 2865345 2997085 3009318 3245970 3356547 3510871 3547570 3596502 3780938 3786965 4011483 4051005 4544358 4966598 5015530 5321355 5594245 5671407 5730690 5994170 6685805 6713094 7021742 7449897 7523295 7573930 7831943 8022966 8102010 8991255 9452345 10532613 10642710 11188490 11342814 11360895 12416495 13371610 14545037 14899794 15046590 15663886 16782735 17383093 17554355 17982510 18904690 20057415 21065226 22721790 23495829 24576097 24832990 28357035 29090074 33565470 34766186 35108710 37249485 39159715 40114830 43635111 46991658 49152194 52149279 52663065 54823601 56714070 72725185 73728291 74498970 78319430 86915465 87270222 101815259 104298558 105326130 109647202 117479145 122880485 145450370 147456582 164470803 173830930 203630518 218175555 234958290 245760970 260746395 274118005 305445777 328941606 368641455 436351110 509076295 521492790 548236010 610891554 712706813 737282910 822354015 1018152590 1425413626 1527228885 1644708030 2138120439 3054457770 3563534065 4276240878 7127068130 10690602195 21381204390
- Sum of all divisors σ(n): 68195675520
- Sum of proper divisors (its aliquot sum) s(n): 46814471130
- 21381204390 is an abundant number, because the sum of its proper divisors (46814471130) is greater than itself. Its abundance is 25433266740
Bases of 21381204390
- Binary: 100111110100110101101001001101001102
- Hexadecimal: 0x4FA6B49A6
- Base-36: 9TLTEW6
Squares and roots of 21381204390
- 21381204390 squared (213812043902) is 457155901166955272100
- 21381204390 cubed (213812043903) is 9774543760945310186758164519000
-
The
square root of 21381204390 is 146223.1321987051 -
The
cube root of 21381204390 is 2775.5180436951
Scales and comparisons
How big is 21381204390?- 21,381,204,390 seconds is equal to 679 years, 44 weeks, 3 days, 15 hours, 26 minutes, 30 seconds.
-
To count from 1 to 21,381,204,390 would take you about one thousand, three hundred fifty-nine 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 21381204390 cubic inches would be around 231.3 feet tall.
Recreational maths with 21381204390
- 21381204390 backwards is 09340218312
- The number of decimal digits it has is: 11
- The sum of 21381204390's digits is 33
- More coming soon!
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