21388108833

Names of 21388108833

• Cardinal: 21388108833 can be written as Twenty-one billion, three hundred eighty-eight million, one hundred eight thousand, eight hundred thirty-three.

Scientific notation

• Scientific notation: 2.1388108833 × 10¹⁰

Factors of 21388108833

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 10
• Sum of prime factors: 371

Divisors of 21388108833

• Number of divisors d(n): 216
• Complete list of divisors:
  1 3 7 9 13 17 21 27 39 49 51 63 91 117 119 147 153 169 189 221 273 289 331 351 357 441 459 507 637 663 819 833 867 993 1071 1183 1323 1521 1547 1911 1989 2023 2317 2457 2499 2601 2873 2979 3213 3549 3757 4303 4563 4641 5627 5733 5967 6069 6951 7497 7803 8281 8619 8937 10647 10829 11271 12909 13923 14161 16219 16881 17199 18207 20111 20853 22491 24843 25857 26299 30121 31941 32487 33813 38727 39389 41769 42483 48657 48841 50643 54621 55939 60333 62559 73151 74529 77571 78897 90363 95659 97461 101439 116181 118167 127449 140777 145971 146523 151929 167817 180999 184093 210847 219453 223587 236691 271089 275723 286977 292383 341887 354501 382347 391573 422331 437913 439569 503451 512057 542997 552279 632541 658359 669613 710073 813267 827169 860931 950963 1025661 1063503 1174719 1243567 1266993 1318707 1510353 1536171 1656837 1897623 1975077 2008839 2393209 2481507 2582793 2741011 2852889 3076983 3524157 3584399 3730701 3800979 4608513 4687291 4970511 5692869 6026517 6656741 7179627 7444521 8223033 8558667 8704969 9230949 10572471 10753197 11192103 13825539 14061873 16166371 18079551 19970223 21538881 24669099 25676001 26114907 32259591 33576309 42185619 46597187 48499113 59910669 60934783 64616643 74007297 78344721 96778773 113164597 126556857 139791561 145497339 179732007 182804349 235034163 339493791 419374683 436492017 548413047 792152179 1018481373 1258124049 1645239141 2376456537 3055444119 7129369611 21388108833
• Sum of all divisors σ(n): 42526769760
• Sum of proper divisors (its aliquot sum) s(n): 21138660927
• 21388108833 is a deficient number, because the sum of its proper divisors (21138660927) is less than itself. Its deficiency is 249447906

Bases of 21388108833

• Binary: 10011111010110101001010010000100001₂
• Hexadecimal: 0x4FAD4A421
• Base-36: 9TPXEE9

Squares and roots of 21388108833

• 21388108833 squared (21388108833²) is 457451199452252621889
• 21388108833 cubed (21388108833³) is 9784016039671169063971530045537
• The square root of 21388108833 is 146246.7395636565
• The cube root of 21388108833 is 2775.8167693637

Scales and comparisons

• 21,388,108,833 seconds is equal to 680 years, 3 weeks, 6 days, 13 hours, 20 minutes, 33 seconds.
• To count from 1 to 21,388,108,833 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 21388108833 cubic inches would be around 231.3 feet tall.

Recreational maths with 21388108833

• 21388108833 backwards is 33880188312
• The number of decimal digits it has is: 11
• The sum of 21388108833's digits is 45
• More coming soon!