18438617568

Names of 18438617568

• Cardinal: 18438617568 can be written as Eighteen billion, four hundred thirty-eight million, six hundred seventeen thousand, five hundred sixty-eight.

Scientific notation

• Scientific notation: 1.8438617568 × 10¹⁰

Factors of 18438617568

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 174936

Divisors of 18438617568

• Number of divisors d(n): 96
• Complete list of divisors:
  1 2 3 4 6 7 8 12 14 16 21 24 28 32 42 48 56 84 96 112 157 168 224 314 336 471 628 672 942 1099 1256 1884 2198 2512 3297 3768 4396 5024 6594 7536 8792 13188 15072 17584 26376 35168 52752 105504 174767 349534 524301 699068 1048602 1223369 1398136 2097204 2446738 2796272 3670107 4194408 4893476 5592544 7340214 8388816 9786952 14680428 16777632 19573904 27438419 29360856 39147808 54876838 58721712 82315257 109753676 117443424 164630514 192068933 219507352 329261028 384137866 439014704 576206799 658522056 768275732 878029408 1152413598 1317044112 1536551464 2304827196 2634088224 3073102928 4609654392 6146205856 9219308784 18438617568
• Sum of all divisors σ(n): 55668501504
• Sum of proper divisors (its aliquot sum) s(n): 37229883936
• 18438617568 is an abundant number, because the sum of its proper divisors (37229883936) is greater than itself. Its abundance is 18791266368

Bases of 18438617568

• Binary: 10001001011000001101111100111100000₂
• Hexadecimal: 0x44B06F9E0
• Base-36: 8GXVKDC

Squares and roots of 18438617568

• 18438617568 squared (18438617568²) is 339982617818958234624
• 18438617568 cubed (18438617568³) is 6268809469731273148396352274432
• The square root of 18438617568 is 135788.8712965831
• The cube root of 18438617568 is 2641.8578887225

Scales and comparisons

• 18,438,617,568 seconds is equal to 586 years, 15 weeks, 22 hours, 12 minutes, 48 seconds.
• To count from 1 to 18,438,617,568 would take you about one thousand, one hundred seventy-two 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 18438617568 cubic inches would be around 220.2 feet tall.

Recreational maths with 18438617568

• 18438617568 backwards is 86571683481
• The number of decimal digits it has is: 11
• The sum of 18438617568's digits is 57
• More coming soon!