21385769769

Names of 21385769769

• Cardinal: 21385769769 can be written as Twenty-one billion, three hundred eighty-five million, seven hundred sixty-nine thousand, seven hundred sixty-nine.

Scientific notation

• Scientific notation: 2.1385769769 × 10¹⁰

Factors of 21385769769

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 14
• Sum of prime factors: 83

Divisors of 21385769769

• Number of divisors d(n): 288
• Complete list of divisors:
  1 3 7 9 13 17 21 27 39 43 49 51 63 81 91 117 119 129 147 153 189 221 243 273 301 343 351 357 387 441 459 559 567 637 663 729 731 819 833 903 1029 1053 1071 1161 1323 1377 1547 1677 1701 1911 1989 2107 2187 2193 2457 2499 2709 3087 3159 3213 3483 3913 3969 4131 4459 4641 5031 5103 5117 5733 5831 5967 6321 6561 6579 7371 7497 8127 9261 9477 9503 9639 10449 10829 11739 11907 12393 13377 13923 14749 15093 15309 15351 17199 17493 17901 18963 19737 22113 22491 24381 27391 27783 28431 28509 28917 31347 32487 35217 35721 35819 37179 40131 41769 44247 45279 45927 46053 51597 52479 53703 56889 59211 66339 66521 67473 73143 75803 82173 83349 85293 85527 86751 94041 97461 105651 107163 107457 111537 120393 125307 132741 135837 138159 154791 157437 161109 170667 177633 191737 199017 199563 202419 219429 227409 246519 250047 250733 256581 260253 282123 292383 316953 321489 322371 361179 375921 398223 407511 414477 464373 465647 472311 483327 512001 532899 575211 597051 598689 607257 658287 682227 739557 750141 752199 769743 780759 877149 950859 967113 1083537 1127763 1194669 1222533 1243431 1393119 1396941 1416933 1449981 1536003 1598697 1725633 1796067 1821771 1974861 2046681 2218671 2250423 2256597 2309229 2631447 2852577 2901339 3250611 3259529 3383289 3584007 3667599 3730293 4179357 4190823 4250799 4608009 4796091 5176899 5388201 5465313 6140043 6656013 6769791 6927687 7894341 8557731 8704017 9751833 9778587 10149867 10752021 11190879 12572469 12752397 13824027 15530697 16164603 18420129 19968039 20309373 20783061 23683023 25673193 26112051 29255499 29335761 32256063 33572637 37717407 38257191 46592091 48493809 55260387 59904117 60928119 62349183 71049069 78336153 88007283 96768189 113152221 139776273 145481427 165781161 179712351 182784357 235008459 264021849 339456663 419328819 436444281 497343483 548353071 792065547 1018369989 1257986457 1645059213 2376196641 3055109967 7128589923 21385769769
• Sum of all divisors σ(n): 43646803200
• Sum of proper divisors (its aliquot sum) s(n): 22261033431
• 21385769769 is an abundant number, because the sum of its proper divisors (22261033431) is greater than itself. Its abundance is 875263662

Bases of 21385769769

• Binary: 10011111010101100001111001100101001₂
• Hexadecimal: 0x4FAB0F329
• Base-36: 9TOJ9K9

Squares and roots of 21385769769

• 21385769769 squared (21385769769²) is 457351148612674313361
• 21385769769 cubed (21385769769³) is 9780806367818356620918506583609
• The square root of 21385769769 is 146238.7423667203
• The cube root of 21385769769 is 2775.7155752871

Scales and comparisons

• 21,385,769,769 seconds is equal to 680 years, 11 hours, 36 minutes, 9 seconds.
• To count from 1 to 21,385,769,769 would take you about one thousand, three hundred sixty 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 21385769769 cubic inches would be around 231.3 feet tall.

Recreational maths with 21385769769

• 21385769769 backwards is 96796758312
• 21385769769 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 21385769769's digits is 63
• More coming soon!