21131699820

Names of 21131699820

• Cardinal: 21131699820 can be written as Twenty-one billion, one hundred thirty-one million, six hundred ninety-nine thousand, eight hundred twenty.

Scientific notation

• Scientific notation: 2.113169982 × 10¹⁰

Factors of 21131699820

• Number of distinct prime factors ω(n): 7
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 9052

Divisors of 21131699820

• Number of divisors d(n): 288
• Complete list of divisors:
  1 2 3 4 5 6 7 10 11 12 14 15 20 21 22 28 30 33 35 42 44 49 55 60 66 70 73 77 84 98 105 110 132 140 146 147 154 165 196 210 219 220 231 245 292 294 308 330 365 385 420 438 462 490 511 539 588 660 730 735 770 803 876 924 980 1022 1078 1095 1155 1460 1470 1533 1540 1606 1617 2044 2156 2190 2310 2409 2555 2695 2940 3066 3212 3234 3577 4015 4380 4620 4818 5110 5390 5621 6132 6468 7154 7665 8030 8085 8951 9636 10220 10731 10780 11242 12045 14308 15330 16060 16170 16863 17885 17902 21462 22484 24090 26853 28105 30660 32340 33726 35770 35804 39347 42924 44755 48180 53655 53706 56210 62657 67452 71540 78694 84315 89510 98461 107310 107412 112420 118041 125314 134265 157388 168630 179020 187971 196735 196922 214620 236082 250628 268530 295383 313285 337260 375942 393470 393844 438599 472164 492305 537060 590205 590766 626570 653423 689227 751884 786940 877198 939855 984610 1180410 1181532 1253140 1306846 1315797 1378454 1476915 1754396 1879710 1960269 1969220 2067681 2192995 2360820 2613692 2631594 2756908 2953830 3267115 3446135 3759420 3920538 4135362 4385990 4573961 4824589 5263188 5907660 6534230 6578985 6892270 7187653 7841076 8270724 8771980 9147922 9649178 9801345 10338405 13068460 13157970 13721883 13784540 14375306 14473767 18295844 19298356 19602690 20676810 21562959 22869805 24122945 26315940 27443766 28750612 28947534 32017727 35938265 39205380 41353620 43125918 45739610 48245890 50313571 54887532 57895068 64035454 68609415 71876530 72368835 86251836 91479220 96053181 96491780 100627142 107814795 128070908 137218830 143753060 144737670 150940713 160088635 192106362 201254284 215629590 251567855 274437660 289475340 301881426 320177270 352194997 384212724 431259180 480265905 503135710 603762852 640354540 704389994 754703565 960531810 1006271420 1056584991 1408779988 1509407130 1760974985 1921063620 2113169982 3018814260 3521949970 4226339964 5282924955 7043899940 10565849910 21131699820
• Sum of all divisors σ(n): 76123224576
• Sum of proper divisors (its aliquot sum) s(n): 54991524756
• 21131699820 is an abundant number, because the sum of its proper divisors (54991524756) is greater than itself. Its abundance is 33859824936

Bases of 21131699820

• Binary: 10011101011100011000010011001101100₂
• Hexadecimal: 0x4EB8C266C
• Base-36: 9PH9NXO

Squares and roots of 21131699820

• 21131699820 squared (21131699820²) is 446548737282588032400
• 21131699820 cubed (21131699820³) is 9436333871255692813401234168000
• The square root of 21131699820 is 145367.4647918165
• The cube root of 21131699820 is 2764.6796189169

Scales and comparisons

• 21,131,699,820 seconds is equal to 671 years, 47 weeks, 6 days, 20 hours, 37 minutes.
• To count from 1 to 21,131,699,820 would take you about one thousand, three hundred forty-three 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 21131699820 cubic inches would be around 230.4 feet tall.

Recreational maths with 21131699820

• 21131699820 backwards is 02899613112
• 21131699820 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 21131699820's digits is 42
• More coming soon!