21518170520

Names of 21518170520

• Cardinal: 21518170520 can be written as Twenty-one billion, five hundred eighteen million, one hundred seventy thousand, five hundred twenty.

Scientific notation

• Scientific notation: 2.151817052 × 10¹⁰

Factors of 21518170520

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 11
• Sum of prime factors: 235

Divisors of 21518170520

• Number of divisors d(n): 320
• Complete list of divisors:
  1 2 4 5 7 8 10 11 14 20 22 28 29 35 40 44 55 56 58 70 77 88 110 116 121 140 145 154 181 203 220 232 242 280 290 308 319 362 385 406 440 484 580 605 616 638 724 770 812 847 905 968 1015 1160 1210 1267 1276 1331 1448 1540 1595 1624 1694 1810 1991 2030 2233 2420 2534 2552 2662 3080 3190 3388 3509 3620 3982 4060 4235 4466 4840 5068 5249 5324 6335 6380 6655 6776 7018 7240 7964 8120 8470 8932 9317 9955 10136 10498 10648 11165 12670 12760 13310 13937 14036 14641 15928 16940 17545 17864 18634 19910 20996 21901 22330 24563 25340 26245 26620 27874 28072 29282 33880 35090 36743 37268 38599 39820 41992 43802 44660 46585 49126 50680 52490 53240 55748 57739 58564 69685 70180 73205 73486 74536 77198 79640 87604 89320 93170 98252 102487 104980 109505 111496 115478 117128 122815 139370 140360 146410 146972 153307 154396 175208 183715 186340 192995 196504 204974 209960 219010 230956 240911 245630 270193 278740 288695 292820 293944 306614 308792 367430 372680 385990 404173 409948 424589 438020 461912 481822 491260 512435 540386 557480 577390 585640 613228 635129 734860 766535 771980 808346 819896 849178 876040 963644 982520 1024870 1080772 1154780 1204555 1226456 1270258 1350965 1469720 1533070 1543960 1616692 1686377 1698356 1927288 2020865 2049740 2122945 2161544 2309560 2409110 2540516 2650021 2701930 2972123 3066140 3175645 3233384 3372754 3396712 4041730 4099480 4245890 4445903 4818220 5081032 5300042 5403860 5944246 6132280 6351290 6745508 6986419 8083460 8431885 8491780 8891806 9636440 10600084 10807720 11888492 12702580 13250105 13491016 13972838 14860615 16166920 16863770 16983560 17783612 18550147 21200168 22229515 23776984 25405160 26500210 27945676 29721230 33727540 34932095 35567224 37100294 44459030 48904933 53000420 55891352 59442460 67455080 69864190 74200588 76850609 88918060 92750735 97809866 106000840 118884920 139728380 148401176 153701218 177836120 185501470 195619732 244524665 279456760 307402436 371002940 384253045 391239464 489049330 537954263 614804872 742005880 768506090 978098660 1075908526 1537012180 1956197320 2151817052 2689771315 3074024360 4303634104 5379542630 10759085260 21518170520
• Sum of all divisors σ(n): 63311976000
• Sum of proper divisors (its aliquot sum) s(n): 41793805480
• 21518170520 is an abundant number, because the sum of its proper divisors (41793805480) is greater than itself. Its abundance is 20275634960

Bases of 21518170520

• Binary: 10100000010100101010011100110011000₂
• Hexadecimal: 0x502953998
• Base-36: 9VVD2MW

Squares and roots of 21518170520

• 21518170520 squared (21518170520²) is 463031662527797070400
• 21518170520 cubed (21518170520³) is 9963594270432231600823644608000
• The square root of 21518170520 is 146690.7308591787
• The cube root of 21518170520 is 2781.4320089817

Scales and comparisons

• 21,518,170,520 seconds is equal to 684 years, 10 weeks, 6 days, 21 hours, 35 minutes, 20 seconds.
• To count from 1 to 21,518,170,520 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 21518170520 cubic inches would be around 231.8 feet tall.

Recreational maths with 21518170520

• 21518170520 backwards is 02507181512
• The number of decimal digits it has is: 11
• The sum of 21518170520's digits is 32
• More coming soon!