21007491264

Names of 21007491264

• Cardinal: 21007491264 can be written as Twenty-one billion, seven million, four hundred ninety-one thousand, two hundred sixty-four.

Scientific notation

• Scientific notation: 2.1007491264 × 10¹⁰

Factors of 21007491264

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 11
• Sum of prime factors: 4052376

Divisors of 21007491264

• Number of divisors d(n): 70
• Complete list of divisors:
  1 2 3 4 6 8 9 12 16 18 24 27 32 36 48 54 64 72 81 96 108 144 162 192 216 288 324 432 576 648 864 1296 1728 2592 5184 4052371 8104742 12157113 16209484 24314226 32418968 36471339 48628452 64837936 72942678 97256904 109414017 129675872 145885356 194513808 218828034 259351744 291770712 328242051 389027616 437656068 583541424 656484102 778055232 875312136 1167082848 1312968204 1750624272 2334165696 2625936408 3501248544 5251872816 7002497088 10503745632 21007491264
• Sum of all divisors σ(n): 62272800524
• Sum of proper divisors (its aliquot sum) s(n): 41265309260
• 21007491264 is an abundant number, because the sum of its proper divisors (41265309260) is greater than itself. Its abundance is 20257817996

Bases of 21007491264

• Binary: 10011100100001001001110000011000000₂
• Hexadecimal: 0x4E424E0C0
• Base-36: 9NFBG00

Squares and roots of 21007491264

• 21007491264 squared (21007491264²) is 441314689207036317696
• 21007491264 cubed (21007491264³) is 9270914478191690531329448607744
• The square root of 21007491264 is 144939.6124736093
• The cube root of 21007491264 is 2759.2521981629

Scales and comparisons

• 21,007,491,264 seconds is equal to 667 years, 50 weeks, 4 days, 6 hours, 14 minutes, 24 seconds.
• To count from 1 to 21,007,491,264 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 21007491264 cubic inches would be around 229.9 feet tall.

Recreational maths with 21007491264

• 21007491264 backwards is 46219470012
• 21007491264 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 21007491264's digits is 36
• More coming soon!