18386442640

Names of 18386442640

• Cardinal: 18386442640 can be written as Eighteen billion, three hundred eighty-six million, four hundred forty-two thousand, six hundred forty.

Scientific notation

• Scientific notation: 1.838644264 × 10¹⁰

Factors of 18386442640

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 3998

Divisors of 18386442640

• Number of divisors d(n): 80
• Complete list of divisors:
  1 2 4 5 8 10 16 20 40 80 109 218 436 545 653 872 1090 1306 1744 2180 2612 3229 3265 4360 5224 6458 6530 8720 10448 12916 13060 16145 25832 26120 32290 51664 52240 64580 71177 129160 142354 258320 284708 351961 355885 569416 703922 711770 1138832 1407844 1423540 1759805 2108537 2815688 2847080 3519610 4217074 5631376 5694160 7039220 8434148 10542685 14078440 16868296 21085370 28156880 33736592 42170740 84341480 168682960 229830533 459661066 919322132 1149152665 1838644264 2298305330 3677288528 4596610660 9193221320 18386442640
• Sum of all divisors σ(n): 43220113200
• Sum of proper divisors (its aliquot sum) s(n): 24833670560
• 18386442640 is an abundant number, because the sum of its proper divisors (24833670560) is greater than itself. Its abundance is 6447227920

Bases of 18386442640

• Binary: 10001000111111010101101100110010000₂
• Hexadecimal: 0x447EAD990
• Base-36: 8G2T9XS

Squares and roots of 18386442640

• 18386442640 squared (18386442640²) is 338061272954010169600
• 18386442640 cubed (18386442640³) is 6215744203974291341327071744000
• The square root of 18386442640 is 135596.6173619387
• The cube root of 18386442640 is 2639.3636857917

Scales and comparisons

• 18,386,442,640 seconds is equal to 584 years, 32 weeks, 6 days, 1 hour, 10 minutes, 40 seconds.
• To count from 1 to 18,386,442,640 would take you about one thousand, one hundred sixty-nine 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 18386442640 cubic inches would be around 219.9 feet tall.

Recreational maths with 18386442640

• 18386442640 backwards is 04624468381
• The number of decimal digits it has is: 11
• The sum of 18386442640's digits is 46
• More coming soon!