18981987318864

Names of 18981987318864

• Cardinal: 18981987318864 can be written as Eighteen trillion, nine hundred eighty-one billion, nine hundred eighty-seven million, three hundred eighteen thousand, eight hundred sixty-four.

Scientific notation

• Scientific notation: 1.8981987318864 × 10¹³

Factors of 18981987318864

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 475882435

Divisors of 18981987318864

• Number of divisors d(n): 60
• Complete list of divisors:
  1 2 3 4 6 8 9 12 16 18 24 36 48 72 144 277 554 831 1108 1662 2216 2493 3324 4432 4986 6648 9972 13296 19944 39888 475882153 951764306 1427646459 1903528612 2855292918 3807057224 4282939377 5710585836 7614114448 8565878754 11421171672 17131757508 22842343344 34263515016 68527030032 131819356381 263638712762 395458069143 527277425524 790916138286 1054554851048 1186374207429 1581832276572 2109109702096 2372748414858 3163664553144 4745496829716 6327329106288 9490993659432 18981987318864
• Sum of all divisors σ(n): 53314981241236
• Sum of proper divisors (its aliquot sum) s(n): 34332993922372
• 18981987318864 is an abundant number, because the sum of its proper divisors (34332993922372) is greater than itself. Its abundance is 15351006603508

Bases of 18981987318864

• Binary: 100010100001110010110100111000111110001010000₂
• Hexadecimal: 0x1143969C7C50
• Base-36: 6Q87D5DG0

Squares and roots of 18981987318864

• 18981987318864 squared (18981987318864²) is 360315842573513707210250496
• 18981987318864 cubed (18981987318864³) is 6839510754516234560947655917704866156544
• The square root of 18981987318864 is 4356832.2573704855
• The cube root of 18981987318864 is 26675.5813529771

Scales and comparisons

• 18,981,987,318,864 seconds is equal to 603,568 years, 25 weeks, 7 hours, 14 minutes, 24 seconds.
• To count from 1 to 18,981,987,318,864 would take you about one million, five hundred eight thousand, nine hundred twenty-one 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 18981987318864 cubic inches would be around 2223 feet tall.

Recreational maths with 18981987318864

• 18981987318864 backwards is 46881378918981
• The number of decimal digits it has is: 14
• The sum of 18981987318864's digits is 81
• More coming soon!