21518766990
21,518,766,990 is an even composite number composed of six prime numbers multiplied together.
What does the number 21518766990 look like?
This visualization shows the relationship between its 6 prime factors (large circles) and 320 divisors.
21518766990 is an even composite number. It is composed of six distinct prime numbers multiplied together. It has a total of three hundred twenty divisors.
Prime factorization of 21518766990:
2 × 34 × 5 × 73 × 73 × 1061
(2 × 3 × 3 × 3 × 3 × 5 × 7 × 7 × 7 × 73 × 1061)See below for interesting mathematical facts about the number 21518766990 from the Numbermatics database.
Names of 21518766990
- Cardinal: 21518766990 can be written as Twenty-one billion, five hundred eighteen million, seven hundred sixty-six thousand, nine hundred ninety.
Scientific notation
- Scientific notation: 2.151876699 × 1010
Factors of 21518766990
Divisors of 21518766990
- Number of divisors d(n): 320
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Complete list of divisors:
1 2 3 5 6 7 9 10 14 15 18 21 27 30 35 42 45 49 54 63 70 73 81 90 98 105 126 135 146 147 162 189 210 219 245 270 294 315 343 365 378 405 438 441 490 511 567 630 657 686 730 735 810 882 945 1022 1029 1061 1095 1134 1314 1323 1470 1533 1715 1890 1971 2058 2122 2190 2205 2555 2646 2835 3066 3087 3183 3285 3430 3577 3942 3969 4410 4599 5110 5145 5305 5670 5913 6174 6366 6570 6615 7154 7427 7665 7938 9198 9261 9549 9855 10290 10610 10731 11826 13230 13797 14854 15330 15435 15915 17885 18522 19098 19710 19845 21462 22281 22995 25039 27594 27783 28647 29565 30870 31830 32193 35770 37135 39690 41391 44562 45990 46305 47745 50078 51989 53655 55566 57294 59130 64386 66843 68985 74270 75117 77453 82782 85941 92610 95490 96579 103978 107310 111405 125195 133686 137970 138915 143235 150234 154906 155967 160965 171882 193158 200529 206955 222810 225351 232359 250390 259945 277830 286470 289737 311934 321930 334215 363923 375585 387265 401058 413910 429705 450702 464718 467901 482895 519890 542171 579474 601587 668430 676053 697077 727846 751170 774530 779835 859410 935802 965790 1002645 1084342 1091769 1126755 1161795 1203174 1352106 1394154 1403703 1448685 1559670 1626513 1819615 2005290 2028159 2091231 2183538 2253510 2323590 2339505 2710855 2807406 2897370 3007935 3253026 3275307 3380265 3485385 3639230 3795197 4056318 4182462 4211109 4679010 4879539 5421710 5458845 6015870 6273693 6550614 6760530 6970770 7018515 7590394 8132565 8422218 9759078 9825921 10140795 10456155 10917690 11385591 12547386 14037030 14638617 16265130 16376535 18975985 19651842 20281590 20912310 21055545 22771182 24397695 26566379 29277234 29477763 31368465 32753070 34156773 37951970 42111090 43915851 48795390 49129605 53132758 56927955 58955526 62736930 68313546 73193085 79699137 87831702 98259210 102470319 113855910 132831895 146386170 147388815 159398274 170783865 204940638 219579255 239097411 265663790 294777630 307410957 341567730 398495685 439158510 478194822 512351595 614821914 717292233 796991370 1024703190 1195487055 1434584466 1537054785 2151876699 2390974110 3074109570 3586461165 4303753398 7172922330 10759383495 21518766990
- Sum of all divisors σ(n): 68465865600
- Sum of proper divisors (its aliquot sum) s(n): 46947098610
- 21518766990 is an abundant number, because the sum of its proper divisors (46947098610) is greater than itself. Its abundance is 25428331620
Bases of 21518766990
- Binary: 101000000101001111001010011100011102
- Hexadecimal: 0x5029E538E
- Base-36: 9VVPUVI
Squares and roots of 21518766990
- 21518766990 squared (215187669902) is 463057332769913660100
- 21518766990 cubed (215187669903) is 9964422846886663334109960099000
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The
square root of 21518766990 is 146692.7639319675 -
The
cube root of 21518766990 is 2781.4577085863
Scales and comparisons
How big is 21518766990?- 21,518,766,990 seconds is equal to 684 years, 11 weeks, 6 days, 19 hours, 16 minutes, 30 seconds.
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To count from 1 to 21,518,766,990 would take you about one thousand, three hundred sixty-eight 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 21518766990 cubic inches would be around 231.8 feet tall.
Recreational maths with 21518766990
- 21518766990 backwards is 09966781512
- 21518766990 is a
Harshad number . - The number of decimal digits it has is: 11
- The sum of 21518766990's digits is 54
- More coming soon!
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