21215155338

Names of 21215155338

• Cardinal: 21215155338 can be written as Twenty-one billion, two hundred fifteen million, one hundred fifty-five thousand, three hundred thirty-eight.

Scientific notation

• Scientific notation: 2.1215155338 × 10¹⁰

Factors of 21215155338

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 12
• Sum of prime factors: 1326

Divisors of 21215155338

• Number of divisors d(n): 192
• Complete list of divisors:
  1 2 3 6 9 13 17 18 26 27 34 39 51 54 78 81 102 117 153 162 221 234 243 289 306 351 442 459 486 578 663 702 729 867 918 1053 1291 1326 1377 1458 1734 1989 2106 2187 2582 2601 2754 3159 3757 3873 3978 4131 4374 5202 5967 6318 7514 7746 7803 8262 9477 11271 11619 11934 12393 15606 16783 17901 18954 21947 22542 23238 23409 24786 28431 33566 33813 34857 35802 37179 43894 46818 50349 53703 56862 65841 67626 69714 70227 74358 100698 101439 104571 107406 131682 140454 151047 161109 197523 202878 209142 210681 285311 302094 304317 313713 322218 373099 395046 421362 453141 483327 570622 592569 608634 627426 632043 746198 855933 906282 912951 941139 966654 1119297 1185138 1264086 1359423 1711866 1777707 1825902 1882278 2238594 2567799 2718846 2738853 2823417 3357891 3555414 4078269 4850287 5135598 5333121 5477706 5646834 6715782 7703397 8156538 8216559 9700574 10073673 10666242 12234807 14550861 15406794 15999363 16433118 20147346 23110191 24469614 29101722 30221019 31998726 36704421 43652583 46220382 47998089 60442038 69330573 73408842 87305166 90663057 95996178 130957749 138661146 181326114 207991719 261915498 271989171 392873247 415983438 543978342 623975157 785746494 815967513 1178619741 1247950314 1631935026 2357239482 3535859223 7071718446 10607577669 21215155338
• Sum of all divisors σ(n): 54641677440
• Sum of proper divisors (its aliquot sum) s(n): 33426522102
• 21215155338 is an abundant number, because the sum of its proper divisors (33426522102) is greater than itself. Its abundance is 12211366764

Bases of 21215155338

• Binary: 10011110000100001011001010010001010₂
• Hexadecimal: 0x4F085948A
• Base-36: 9QUYEMI

Squares and roots of 21215155338

• 21215155338 squared (21215155338²) is 450082816015469894244
• 21215155338 cubed (21215155338³) is 9548576856732668017448892074472
• The square root of 21215155338 is 145654.2321321285
• The cube root of 21215155338 is 2768.3143587983

Scales and comparisons

• 21,215,155,338 seconds is equal to 674 years, 29 weeks, 6 days, 18 hours, 42 minutes, 18 seconds.
• To count from 1 to 21,215,155,338 would take you about one thousand, three hundred forty-nine 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 21215155338 cubic inches would be around 230.7 feet tall.

Recreational maths with 21215155338

• 21215155338 backwards is 83355151212
• The number of decimal digits it has is: 11
• The sum of 21215155338's digits is 36
• More coming soon!