21029016645

Names of 21029016645

• Cardinal: 21029016645 can be written as Twenty-one billion, twenty-nine million, sixteen thousand, six hundred forty-five.

Scientific notation

• Scientific notation: 2.1029016645 × 10¹⁰

Factors of 21029016645

• Number of distinct prime factors ω(n): 7
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 715

Divisors of 21029016645

• Number of divisors d(n): 288
• Complete list of divisors:
  1 3 5 7 9 13 15 21 29 35 39 41 45 49 63 65 87 91 105 117 123 145 147 195 203 205 245 261 273 287 315 369 377 435 441 455 533 585 609 615 617 637 735 819 861 1015 1131 1189 1305 1365 1421 1435 1599 1827 1845 1851 1885 1911 2009 2205 2583 2639 2665 3045 3085 3185 3393 3567 3731 4095 4263 4305 4319 4797 5553 5655 5733 5945 6027 7105 7917 7995 8021 8323 9135 9255 9555 10045 10701 11193 12789 12915 12957 13195 15457 16965 17835 17893 18081 18473 18655 21315 21595 23751 23985 24063 24969 25297 26117 27765 28665 30135 30233 33579 38871 39585 40105 41615 46371 53505 53679 55419 55965 56147 58261 63945 64785 72189 74907 75891 77285 78351 89465 90405 90699 92365 108199 118755 120315 124845 125251 126485 130585 139113 151165 161037 166257 167895 168441 174783 177079 194355 227673 231855 232609 235053 268395 272097 277095 280735 291305 324597 328861 360945 374535 375753 379455 391755 393029 453495 505323 524349 531237 540995 626255 695565 697827 733613 757393 805185 831285 842205 873915 876757 885395 973791 986583 1127259 1138365 1163045 1175265 1179087 1239553 1360485 1593711 1622985 1628263 1644305 1878765 1965145 2093481 2200839 2272179 2302027 2526615 2621745 2630271 2656185 2959749 3489135 3537261 3668065 3718659 3786965 4383785 4868955 4884789 4932915 5135291 5636295 5895435 6197765 6602517 6816537 6906081 7890813 7968555 8141315 9536969 10467405 11004195 11155977 11360895 11397841 11510135 13151355 14654367 14798745 15405873 16114189 17686305 18593295 20718243 24423945 25676455 28610907 33012585 34082685 34193523 34530405 35947037 39454065 46217619 47684845 48342567 55779885 56989205 66758783 73271835 77029365 80570945 85832721 102580569 103591215 107841111 143054535 145027701 170967615 179735185 200276349 231088095 241712835 323523333 333793915 429163605 467311481 512902845 539205555 600829047 725138505 1001381745 1401934443 1617616665 2336557405 3004145235 4205803329 7009672215 21029016645
• Sum of all divisors σ(n): 48468157920
• Sum of proper divisors (its aliquot sum) s(n): 27439141275
• 21029016645 is an abundant number, because the sum of its proper divisors (27439141275) is greater than itself. Its abundance is 6410124630

Bases of 21029016645

• Binary: 10011100101011011010101010001000101₂
• Hexadecimal: 0x4E56D5445
• Base-36: 9NS4T39

Squares and roots of 21029016645

• 21029016645 squared (21029016645²) is 442219541055687056025
• 21029016645 cubed (21029016645³) is 9299442089604303973060772536125
• The square root of 21029016645 is 145013.8498385585
• The cube root of 21029016645 is 2760.1943014595

Scales and comparisons

• 21,029,016,645 seconds is equal to 668 years, 34 weeks, 1 day, 9 hours, 30 minutes, 45 seconds.
• To count from 1 to 21,029,016,645 would take you about one thousand, three hundred thirty-seven 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 21029016645 cubic inches would be around 230 feet tall.

Recreational maths with 21029016645

• 21029016645 backwards is 54661092012
• The number of decimal digits it has is: 11
• The sum of 21029016645's digits is 36
• More coming soon!