18045379891

Names of 18045379891

• Cardinal: 18045379891 can be written as Eighteen billion, forty-five million, three hundred seventy-nine thousand, eight hundred ninety-one.

Scientific notation

• Scientific notation: 1.8045379891 × 10¹⁰

Factors of 18045379891

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 94

Divisors of 18045379891

• Number of divisors d(n): 96
• Complete list of divisors:
  1 7 11 29 47 49 77 121 203 319 329 343 517 539 841 847 1331 1363 1421 2233 2303 3509 3619 3773 5687 5887 5929 9251 9317 9541 9947 14993 15631 16121 24563 25333 38599 39527 39809 41209 41503 62557 64757 65219 66787 101761 104951 109417 164923 171941 177331 270193 276689 278663 288463 434797 437899 453299 456533 467509 712327 734657 1119371 1154461 1203587 1814153 1891351 1936823 1950641 3043579 3065293 3173093 4782767 4986289 5142599 7835597 8081227 12699071 13239457 13557761 21305053 21457051 33479369 34904023 52610437 54849179 56568589 88893497 149135371 234355583 368273059 383944253 622254479 1640489081 2577911413 18045379891
• Sum of all divisors σ(n): 24482764800
• Sum of proper divisors (its aliquot sum) s(n): 6437384909
• 18045379891 is a deficient number, because the sum of its proper divisors (6437384909) is less than itself. Its deficiency is 11607994982

Bases of 18045379891

• Binary: 10000110011100101101010010100110011₂
• Hexadecimal: 0x43396A533
• Base-36: 8AFR48J

Squares and roots of 18045379891

• 18045379891 squared (18045379891²) is 325635735410507171881
• 18045379891 cubed (18045379891³) is 5876220551567762749572678044971
• The square root of 18045379891 is 134333.0930597521
• The cube root of 18045379891 is 2622.9419341057

Scales and comparisons

• 18,045,379,891 seconds is equal to 573 years, 40 weeks, 6 days, 13 hours, 31 minutes, 31 seconds.
• To count from 1 to 18,045,379,891 would take you about one thousand, one hundred forty-seven 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 18045379891 cubic inches would be around 218.6 feet tall.

Recreational maths with 18045379891

• 18045379891 backwards is 19897354081
• The number of decimal digits it has is: 11
• The sum of 18045379891's digits is 55
• More coming soon!