18451638816

Names of 18451638816

• Cardinal: 18451638816 can be written as Eighteen billion, four hundred fifty-one million, six hundred thirty-eight thousand, eight hundred sixteen.

Scientific notation

• Scientific notation: 1.8451638816 × 10¹⁰

Factors of 18451638816

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 20306

Divisors of 18451638816

• Number of divisors d(n): 96
• Complete list of divisors:
  1 2 3 4 6 8 12 13 16 24 26 32 39 48 52 78 96 104 156 208 312 416 624 757 1248 1514 2271 3028 4542 6056 9084 9841 12112 18168 19531 19682 24224 29523 36336 39062 39364 58593 59046 72672 78124 78728 117186 118092 156248 157456 234372 236184 253903 312496 314912 468744 472368 507806 624992 761709 937488 944736 1015612 1523418 1874976 2031224 3046836 4062448 6093672 8124896 12187344 14784967 24374688 29569934 44354901 59139868 88709802 118279736 177419604 192204571 236559472 354839208 384409142 473118944 576613713 709678416 768818284 1153227426 1419356832 1537636568 2306454852 3075273136 4612909704 6150546272 9225819408 18451638816
• Sum of all divisors σ(n): 52232943168
• Sum of proper divisors (its aliquot sum) s(n): 33781304352
• 18451638816 is an abundant number, because the sum of its proper divisors (33781304352) is greater than itself. Its abundance is 15329665536

Bases of 18451638816

• Binary: 10001001011110011011010101000100000₂
• Hexadecimal: 0x44BCDAA20
• Base-36: 8H5MNMO

Squares and roots of 18451638816

• 18451638816 squared (18451638816²) is 340462974996117881856
• 18451638816 cubed (18451638816³) is 6282099844849206158165871722496
• The square root of 18451638816 is 135836.8095031681
• The cube root of 18451638816 is 2642.4796307817

Scales and comparisons

• 18,451,638,816 seconds is equal to 586 years, 36 weeks, 4 days, 15 hours, 13 minutes, 36 seconds.
• To count from 1 to 18,451,638,816 would take you about one thousand, one hundred seventy-three 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 18451638816 cubic inches would be around 220.2 feet tall.

Recreational maths with 18451638816

• 18451638816 backwards is 61883615481
• The number of decimal digits it has is: 11
• The sum of 18451638816's digits is 51
• More coming soon!