21487970772

Names of 21487970772

• Cardinal: 21487970772 can be written as Twenty-one billion, four hundred eighty-seven million, nine hundred seventy thousand, seven hundred seventy-two.

Scientific notation

• Scientific notation: 2.1487970772 × 10¹⁰

Factors of 21487970772

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 7
• Sum of prime factors: 10792

Divisors of 21487970772

• Number of divisors d(n): 72
• Complete list of divisors:
  1 2 3 4 6 9 12 18 36 73 146 219 292 438 657 827 876 1314 1654 2481 2628 3308 4962 7443 9887 9924 14886 19774 29661 29772 39548 59322 60371 88983 118644 120742 177966 181113 241484 355932 362226 543339 721751 724452 1086678 1443502 2165253 2173356 2887004 4330506 6495759 8176549 8661012 12991518 16353098 24529647 25983036 32706196 49059294 73588941 98118588 147177882 294355764 596888077 1193776154 1790664231 2387552308 3581328462 5371992693 7162656924 10743985386 21487970772
• Sum of all divisors σ(n): 55133035776
• Sum of proper divisors (its aliquot sum) s(n): 33645065004
• 21487970772 is an abundant number, because the sum of its proper divisors (33645065004) is greater than itself. Its abundance is 12157094232

Bases of 21487970772

• Binary: 10100000000110010000110100111010100₂
• Hexadecimal: 0x500C869D4
• Base-36: 9VDDSD0

Squares and roots of 21487970772

• 21487970772 squared (21487970772²) is 461732887898326275984
• 21487970772 cubed (21487970772³) is 9921702799630387526063797539648
• The square root of 21487970772 is 146587.7579199573
• The cube root of 21487970772 is 2780.1301964453

Scales and comparisons

• 21,487,970,772 seconds is equal to 683 years, 13 weeks, 8 hours, 46 minutes, 12 seconds.
• To count from 1 to 21,487,970,772 would take you about one thousand, three hundred sixty-six 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 21487970772 cubic inches would be around 231.7 feet tall.

Recreational maths with 21487970772

• 21487970772 backwards is 27707978412
• The number of decimal digits it has is: 11
• The sum of 21487970772's digits is 54
• More coming soon!