21003476949

Names of 21003476949

• Cardinal: 21003476949 can be written as Twenty-one billion, three million, four hundred seventy-six thousand, nine hundred forty-nine.

Scientific notation

• Scientific notation: 2.1003476949 × 10¹⁰

Factors of 21003476949

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 7
• Sum of prime factors: 695

Divisors of 21003476949

• Number of divisors d(n): 72
• Complete list of divisors:
  1 3 7 9 13 21 39 63 71 91 117 213 273 497 601 639 819 923 1491 1803 2769 4207 4473 5409 6461 7813 8307 12621 19383 23439 37863 42671 54691 58149 70317 128013 164073 298697 361201 384039 492219 554723 896091 1083603 1664169 2528407 2688273 3250809 3883061 4695613 4992507 7585221 11649183 14086839 22755663 25645271 32869291 34947549 42260517 76935813 98607873 179516897 230807439 295823619 333388523 538550691 1000165569 1615652073 2333719661 3000496707 7001158983 21003476949
• Sum of all divisors σ(n): 37928532096
• Sum of proper divisors (its aliquot sum) s(n): 16925055147
• 21003476949 is a deficient number, because the sum of its proper divisors (16925055147) is less than itself. Its deficiency is 4078421802

Bases of 21003476949

• Binary: 10011100011111001111001111111010101₂
• Hexadecimal: 0x4E3E79FD5
• Base-36: 9NCXEJ9

Squares and roots of 21003476949

• 21003476949 squared (21003476949²) is 441146043947174348601
• 21003476949 cubed (21003476949³) is 9265600765187017404525193898349
• The square root of 21003476949 is 144925.7635791511
• The cube root of 21003476949 is 2759.0764320841

Scales and comparisons

• 21,003,476,949 seconds is equal to 667 years, 43 weeks, 6 days, 19 hours, 9 minutes, 9 seconds.
• To count from 1 to 21,003,476,949 would take you about one thousand, three hundred thirty-five 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 21003476949 cubic inches would be around 229.9 feet tall.

Recreational maths with 21003476949

• 21003476949 backwards is 94967430012
• The number of decimal digits it has is: 11
• The sum of 21003476949's digits is 45
• More coming soon!