18106221987

Names of 18106221987

• Cardinal: 18106221987 can be written as Eighteen billion, one hundred six million, two hundred twenty-one thousand, nine hundred eighty-seven.

Scientific notation

• Scientific notation: 1.8106221987 × 10¹⁰

Factors of 18106221987

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 7
• Sum of prime factors: 1166

Divisors of 18106221987

• Number of divisors d(n): 96
• Complete list of divisors:
  1 3 7 9 21 31 37 63 93 111 217 259 279 331 333 651 757 777 993 1147 1953 2271 2317 2331 2979 3441 5299 6813 6951 8029 10261 10323 12247 15897 20853 23467 24087 28009 30783 36741 47691 70401 71827 72261 84027 85729 92349 110223 164269 196063 211203 215481 250567 252081 257187 379657 492807 588189 646443 751701 771561 868279 1138971 1478421 1753969 1764567 2255103 2604837 2657599 3416913 5261907 6077953 7767577 7814511 7972797 9270979 15785721 18233859 23302731 23918391 27812937 54373039 54701577 64896853 69908193 83438811 163119117 194690559 287400349 489357351 584071677 862201047 2011802443 2586603141 6035407329 18106221987
• Sum of all divisors σ(n): 31825424384
• Sum of proper divisors (its aliquot sum) s(n): 13719202397
• 18106221987 is a deficient number, because the sum of its proper divisors (13719202397) is less than itself. Its deficiency is 4387019590

Bases of 18106221987

• Binary: 10000110111001101110000010110100011₂
• Hexadecimal: 0x4373705A3
• Base-36: 8BFZ6AR

Squares and roots of 18106221987

• 18106221987 squared (18106221987²) is 327835274642522228169
• 18106221987 cubed (18106221987³) is 5935858257846619532809778551803
• The square root of 18106221987 is 134559.3623164141
• The cube root of 18106221987 is 2625.8864785019

Scales and comparisons

• 18,106,221,987 seconds is equal to 575 years, 37 weeks, 3 days, 18 hours, 6 minutes, 27 seconds.
• To count from 1 to 18,106,221,987 would take you about one thousand, one hundred fifty-one 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 18106221987 cubic inches would be around 218.8 feet tall.

Recreational maths with 18106221987

• 18106221987 backwards is 78912260181
• The number of decimal digits it has is: 11
• The sum of 18106221987's digits is 45
• More coming soon!