21131157042

Names of 21131157042

• Cardinal: 21131157042 can be written as Twenty-one billion, one hundred thirty-one million, one hundred fifty-seven thousand and forty-two.

Scientific notation

• Scientific notation: 2.1131157042 × 10¹⁰

Factors of 21131157042

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 17
• Sum of prime factors: 52

Divisors of 21131157042

• Number of divisors d(n): 90
• Complete list of divisors:
  1 2 3 6 9 18 27 47 54 81 94 141 162 243 282 423 486 729 846 1269 1458 2187 2209 2538 3807 4374 4418 6561 6627 7614 11421 13122 13254 19683 19881 22842 34263 39366 39762 59049 59643 68526 102789 118098 119286 177147 178929 205578 308367 354294 357858 531441 536787 616734 925101 1062882 1073574 1594323 1610361 1850202 2775303 3188646 3220722 4782969 4831083 5550606 8325909 9565938 9662166 14493249 16651818 24977727 28986498 43479747 49955454 74933181 86959494 130439241 149866362 224799543 260878482 391317723 449599086 782635446 1173953169 2347906338 3521859507 7043719014 10565578521 21131157042
• Sum of all divisors σ(n): 48578221263
• Sum of proper divisors (its aliquot sum) s(n): 27447064221
• 21131157042 is an abundant number, because the sum of its proper divisors (27447064221) is greater than itself. Its abundance is 6315907179

Bases of 21131157042

• Binary: 10011101011100000111101111000110010₂
• Hexadecimal: 0x4EB83DE32
• Base-36: 9PGY14I

Squares and roots of 21131157042

• 21131157042 squared (21131157042²) is 446525797933666189764
• 21131157042 cubed (21131157042³) is 9435606759440659354708856918088
• The square root of 21131157042 is 145365.5978627681
• The cube root of 21131157042 is 2764.6559479999

Scales and comparisons

• 21,131,157,042 seconds is equal to 671 years, 47 weeks, 13 hours, 50 minutes, 42 seconds.
• To count from 1 to 21,131,157,042 would take you about one thousand, three hundred forty-three 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 21131157042 cubic inches would be around 230.4 feet tall.

Recreational maths with 21131157042

• 21131157042 backwards is 24075113112
• 21131157042 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 21131157042's digits is 27
• More coming soon!