18018221808

Names of 18018221808

• Cardinal: 18018221808 can be written as Eighteen billion, eighteen million, two hundred twenty-one thousand, eight hundred eight.

Scientific notation

• Scientific notation: 1.8018221808 × 10¹⁰

Factors of 18018221808

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 259

Divisors of 18018221808

• Number of divisors d(n): 80
• Complete list of divisors:
  1 2 3 4 6 8 12 16 24 48 97 157 194 291 314 388 471 582 628 776 942 1164 1256 1552 1884 2328 2512 3768 4656 7536 15229 24649 30458 45687 49298 60916 73947 91374 98596 121832 147894 182748 197192 243664 295788 365496 394384 591576 730992 1183152 2390953 3869893 4781906 7172859 7739786 9563812 11609679 14345718 15479572 19127624 23219358 28691436 30959144 38255248 46438716 57382872 61918288 92877432 114765744 185754864 375379621 750759242 1126138863 1501518484 2252277726 3003036968 4504555452 6006073936 9009110904 18018221808
• Sum of all divisors σ(n): 47328394400
• Sum of proper divisors (its aliquot sum) s(n): 29310172592
• 18018221808 is an abundant number, because the sum of its proper divisors (29310172592) is greater than itself. Its abundance is 11291950784

Bases of 18018221808

• Binary: 10000110001111110000011111011110000₂
• Hexadecimal: 0x431F83EF0
• Base-36: 89ZL0XC

Squares and roots of 18018221808

• 18018221808 squared (18018221808²) is 324656317122286788864
• 18018221808 cubed (18018221808³) is 5849729533277751621939616346112
• The square root of 18018221808 is 134231.9701412447
• The cube root of 18018221808 is 2621.6254412677

Scales and comparisons

• 18,018,221,808 seconds is equal to 572 years, 48 weeks, 5 hours, 36 minutes, 48 seconds.
• To count from 1 to 18,018,221,808 would take you about one thousand, one hundred forty-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 18018221808 cubic inches would be around 218.5 feet tall.

Recreational maths with 18018221808

• 18018221808 backwards is 80812281081
• The number of decimal digits it has is: 11
• The sum of 18018221808's digits is 39
• More coming soon!