18969818728

Names of 18969818728

• Cardinal: 18969818728 can be written as Eighteen billion, nine hundred sixty-nine million, eight hundred eighteen thousand, seven hundred twenty-eight.

Scientific notation

• Scientific notation: 1.8969818728 × 10¹⁰

Factors of 18969818728

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 7
• Sum of prime factors: 109570

Divisors of 18969818728

• Number of divisors d(n): 64
• Complete list of divisors:
  1 2 4 7 8 14 19 28 38 56 76 133 152 163 266 326 532 652 1064 1141 1304 2282 3097 4564 6194 9128 12388 21679 24776 43358 86716 109379 173432 218758 437516 765653 875032 1531306 2078201 3062612 4156402 6125224 8312804 14547407 16625608 17828777 29094814 35657554 58189628 71315108 116379256 124801439 142630216 249602878 338746763 499205756 677493526 998411512 1354987052 2371227341 2709974104 4742454682 9484909364 18969818728
• Sum of all divisors σ(n): 43051968000
• Sum of proper divisors (its aliquot sum) s(n): 24082149272
• 18969818728 is an abundant number, because the sum of its proper divisors (24082149272) is greater than itself. Its abundance is 5112330544

Bases of 18969818728

• Binary: 10001101010101100000111011001101000₂
• Hexadecimal: 0x46AB07668
• Base-36: 8PQ51T4

Squares and roots of 18969818728

• 18969818728 squared (18969818728²) is 359854022573179537984
• 18969818728 cubed (18969818728³) is 6826365576754835950155270564352
• The square root of 18969818728 is 137730.9650296549
• The cube root of 18969818728 is 2666.9879919325

Scales and comparisons

• 18,969,818,728 seconds is equal to 603 years, 9 weeks, 3 days, 2 hours, 5 minutes, 28 seconds.
• To count from 1 to 18,969,818,728 would take you about one thousand, two hundred six 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 18969818728 cubic inches would be around 222.2 feet tall.

Recreational maths with 18969818728

• 18969818728 backwards is 82781896981
• The number of decimal digits it has is: 11
• The sum of 18969818728's digits is 67
• More coming soon!