18018728928

Names of 18018728928

• Cardinal: 18018728928 can be written as Eighteen billion, eighteen million, seven hundred twenty-eight thousand, nine hundred twenty-eight.

Scientific notation

• Scientific notation: 1.8018728928 × 10¹⁰

Factors of 18018728928

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 76485

Divisors of 18018728928

• Number of divisors d(n): 72
• Complete list of divisors:
  1 2 3 4 6 8 9 12 16 18 24 32 36 48 72 96 144 288 827 1654 2481 3308 4962 6616 7443 9924 13232 14886 19848 26464 29772 39696 59544 75653 79392 119088 151306 226959 238176 302612 453918 605224 680877 907836 1210448 1361754 1815672 2420896 2723508 3631344 5447016 7262688 10894032 21788064 62565031 125130062 187695093 250260124 375390186 500520248 563085279 750780372 1001040496 1126170558 1501560744 2002080992 2252341116 3003121488 4504682232 6006242976 9009364464 18018728928
• Sum of all divisors σ(n): 51303398328
• Sum of proper divisors (its aliquot sum) s(n): 33284669400
• 18018728928 is an abundant number, because the sum of its proper divisors (33284669400) is greater than itself. Its abundance is 15265940472

Bases of 18018728928

• Binary: 10000110001111111111111101111100000₂
• Hexadecimal: 0x431FFFBE0
• Base-36: 89ZVW80

Squares and roots of 18018728928

• 18018728928 squared (18018728928²) is 324674592180744029184
• 18018728928 cubed (18018728928³) is 5850223466313775043221017034752
• The square root of 18018728928 is 134233.8590967271
• The cube root of 18018728928 is 2621.6500361149

Scales and comparisons

• 18,018,728,928 seconds is equal to 572 years, 48 weeks, 6 days, 2 hours, 28 minutes, 48 seconds.
• To count from 1 to 18,018,728,928 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 18018728928 cubic inches would be around 218.5 feet tall.

Recreational maths with 18018728928

• 18018728928 backwards is 82982781081
• The number of decimal digits it has is: 11
• The sum of 18018728928's digits is 54
• More coming soon!