18388672497

Names of 18388672497

• Cardinal: 18388672497 can be written as Eighteen billion, three hundred eighty-eight million, six hundred seventy-two thousand, four hundred ninety-seven.

Scientific notation

• Scientific notation: 1.8388672497 × 10¹⁰

Factors of 18388672497

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 484

Divisors of 18388672497

• Number of divisors d(n): 72
• Complete list of divisors:
  1 3 9 13 39 47 117 141 169 421 423 507 611 1263 1521 1833 2197 2209 3789 5473 5499 6591 6627 7943 16419 19773 19787 19881 23829 28717 49257 59361 71149 71487 86151 103259 178083 213447 257231 258453 309777 373321 640341 771693 924937 929331 929989 1119963 2315079 2774811 2789967 3344003 3359889 4853173 8324433 8369901 10032009 12089857 14559519 30096027 36269571 43472039 43678557 108808713 130416117 157168141 391248351 471504423 1414513269 2043185833 6129557499 18388672497
• Sum of all divisors σ(n): 29468926760
• Sum of proper divisors (its aliquot sum) s(n): 11080254263
• 18388672497 is a deficient number, because the sum of its proper divisors (11080254263) is less than itself. Its deficiency is 7308418234

Bases of 18388672497

• Binary: 10001001000000011001101111111110001₂
• Hexadecimal: 0x4480CDFF1
• Base-36: 8G452I9

Squares and roots of 18388672497

• 18388672497 squared (18388672497²) is 338143276201924215009
• 18388672497 cubed (18388672497³) is 6218005963139798431014312907473
• The square root of 18388672497 is 135604.8395043479
• The cube root of 18388672497 is 2639.4703797257

Scales and comparisons

• 18,388,672,497 seconds is equal to 584 years, 36 weeks, 3 days, 20 hours, 34 minutes, 57 seconds.
• To count from 1 to 18,388,672,497 would take you about one thousand, one hundred sixty-nine 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 18388672497 cubic inches would be around 220 feet tall.

Recreational maths with 18388672497

• 18388672497 backwards is 79427688381
• The number of decimal digits it has is: 11
• The sum of 18388672497's digits is 63
• More coming soon!