18938479721642

Names of 18938479721642

• Cardinal: 18938479721642 can be written as Eighteen trillion, nine hundred thirty-eight billion, four hundred seventy-nine million, seven hundred twenty-one thousand, six hundred forty-two.

Scientific notation

• Scientific notation: 1.8938479721642 × 10¹³

Factors of 18938479721642

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 6
• Sum of prime factors: 7111

Divisors of 18938479721642

• Number of divisors d(n): 64
• Complete list of divisors:
  1 2 13 26 97 194 1009 1261 1759 2018 2522 3518 4231 8462 13117 22867 26234 45734 55003 97873 110006 170623 195746 341246 410407 820814 1272349 1774831 2218099 2544698 3549662 4269079 4436198 5335291 7442329 8538158 10670582 14884658 23072803 46145606 55498027 96750277 110996054 172158607 193500554 344317214 414100663 721905913 828201326 1443811826 2238061891 4476123782 5383308619 7509309961 9384776869 10766617238 15018619922 18769553738 97621029493 195242058986 728403066217 1456806132434 9469239860821 18938479721642
• Sum of all divisors σ(n): 30963857971200
• Sum of proper divisors (its aliquot sum) s(n): 12025378249558
• 18938479721642 is a deficient number, because the sum of its proper divisors (12025378249558) is less than itself. Its deficiency is 6913101472084

Bases of 18938479721642

• Binary: 100010011100101110101010110110011110010101010₂
• Hexadecimal: 0x1139755B3CAA
• Base-36: 6PO7TUKKQ

Squares and roots of 18938479721642

• 18938479721642 squared (18938479721642²) is 358666014167045245803176164
• 18938479721642 cubed (18938479721642³) is 6792589036144748675228155187110209341288
• The square root of 18938479721642 is 4351836.3620019079
• The cube root of 18938479721642 is 26655.1852046081

Scales and comparisons

• 18,938,479,721,642 seconds is equal to 602,185 years, 3 weeks, 6 days, 3 hours, 34 minutes, 2 seconds.
• To count from 1 to 18,938,479,721,642 would take you about one million, five hundred five thousand, four hundred sixty-two 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 18938479721642 cubic inches would be around 2221.3 feet tall.

Recreational maths with 18938479721642

• 18938479721642 backwards is 24612797483981
• The number of decimal digits it has is: 14
• The sum of 18938479721642's digits is 71
• More coming soon!