21165255619220

Names of 21165255619220

• Cardinal: 21165255619220 can be written as Twenty-one trillion, one hundred sixty-five billion, two hundred fifty-five million, six hundred nineteen thousand, two hundred twenty.

Scientific notation

• Scientific notation: 2.116525561922 × 10¹³

Factors of 21165255619220

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 7
• Sum of prime factors: 14567

Divisors of 21165255619220

• Number of divisors d(n): 54
• Complete list of divisors:
  1 2 4 5 10 20 71 142 284 355 710 1420 5041 10082 14489 20164 25205 28978 50410 57956 72445 100820 144890 289780 1028719 2057438 4114876 5143595 10287190 20574380 73039049 146078098 209931121 292156196 365195245 419862242 730390490 839724484 1049655605 1460780980 2099311210 4198622420 14905109591 29810219182 59620438364 74525547955 149051095910 298102191820 1058262780961 2116525561922 4233051123844 5291313904805 10582627809610 21165255619220
• Sum of all divisors σ(n): 45084980179806
• Sum of proper divisors (its aliquot sum) s(n): 23919724560586
• 21165255619220 is an abundant number, because the sum of its proper divisors (23919724560586) is greater than itself. Its abundance is 2754468941366

Bases of 21165255619220

• Binary: 100110011111111101011100010101111001010010100₂
• Hexadecimal: 0x133FEB8AF294
• Base-36: 7I36MQ3KK

Squares and roots of 21165255619220

• 21165255619220 squared (21165255619220²) is 447968045426923785633408400
• 21165255619220 cubed (21165255619220³) is 9481358190703198877756171845061149448000
• The square root of 21165255619220 is 4600571.2274912123
• The cube root of 21165255619220 is 27661.4222365165

Scales and comparisons

• 21,165,255,619,220 seconds is equal to 672,989 years, 34 weeks, 2 days, 8 hours, 20 seconds.
• To count from 1 to 21,165,255,619,220 would take you about one million, six hundred eighty-two thousand, four hundred seventy-four 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 21165255619220 cubic inches would be around 2305.1 feet tall.

Recreational maths with 21165255619220

• 21165255619220 backwards is 02291655256112
• The number of decimal digits it has is: 14
• The sum of 21165255619220's digits is 47
• More coming soon!