18403985920

Names of 18403985920

• Cardinal: 18403985920 can be written as Eighteen billion, four hundred three million, nine hundred eighty-five thousand, nine hundred twenty.

Scientific notation

• Scientific notation: 1.840398592 × 10¹⁰

Factors of 18403985920

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 13
• Sum of prime factors: 200

Divisors of 18403985920

• Number of divisors d(n): 80
• Complete list of divisors:
  1 2 4 5 8 10 16 20 32 40 64 80 128 160 193 256 320 386 512 640 772 965 1280 1544 1930 2560 3088 3860 6176 7720 12352 15440 24704 30880 37249 49408 61760 74498 98816 123520 148996 186245 247040 297992 372490 494080 595984 744980 1191968 1489960 2383936 2979920 4767872 5959840 7189057 9535744 11919680 14378114 19071488 23839360 28756228 35945285 47678720 57512456 71890570 95357440 115024912 143781140 230049824 287562280 460099648 575124560 920199296 1150249120 1840398592 2300498240 3680797184 4600996480 9201992960 18403985920
• Sum of all divisors σ(n): 44356257000
• Sum of proper divisors (its aliquot sum) s(n): 25952271080
• 18403985920 is an abundant number, because the sum of its proper divisors (25952271080) is greater than itself. Its abundance is 7548285160

Bases of 18403985920

• Binary: 10001001000111101101000101000000000₂
• Hexadecimal: 0x448F68A00
• Base-36: 8GD9AF4

Squares and roots of 18403985920

• 18403985920 squared (18403985920²) is 338706697743558246400
• 18403985920 cubed (18403985920³) is 6233553296282141737445490688000
• The square root of 18403985920 is 135661.2911629549
• The cube root of 18403985920 is 2640.2028616689

Scales and comparisons

• 18,403,985,920 seconds is equal to 585 years, 9 weeks, 6 days, 2 hours, 18 minutes, 40 seconds.
• To count from 1 to 18,403,985,920 would take you about one thousand, one hundred seventy 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 18403985920 cubic inches would be around 220 feet tall.

Recreational maths with 18403985920

• 18403985920 backwards is 02958930481
• The number of decimal digits it has is: 11
• The sum of 18403985920's digits is 49
• More coming soon!