21012729442087621

Names of 21012729442087621

• Cardinal: 21012729442087621 can be written as Twenty-one quadrillion, twelve trillion, seven hundred twenty-nine billion, four hundred forty-two million, eighty-seven thousand, six hundred twenty-one.

Scientific notation

• Scientific notation: 2.1012729442087621 × 10¹⁶

Factors of 21012729442087621

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 7
• Sum of prime factors: 36044

Divisors of 21012729442087621

• Number of divisors d(n): 96
• Complete list of divisors:
  1 7 49 71 127 337 497 889 2359 3479 4561 6223 9017 16513 23927 30941 31927 42799 63119 167489 216587 223489 299593 323831 441833 579247 1172423 1516109 1537057 2097151 2196811 2266817 3038729 3929507 4054729 10427117 10759399 15377677 15867719 21271103 27506549 28383103 41126537 72989819 75315793 107643739 109131047 141121901 148897721 192545843 195206239 278994997 287885759 510928733 740325307 763917329 987853307 1324243859 1366443673 1952964979 2015200313 5182277149 5347421303 6914973149 9269707013 9565105711 10019654971 13670754853 13859642969 17922481427 36275940043 47558080637 64887949091 70137584797 94021313989 97017500783 125457369989 332906564459 490963093579 658149197923 679122505481 878201589923 1272496181317 2330345951213 3376623725227 4607044385461 6039876240899 8907473269219 23636366076589 42279133686293 62352312884533 165454562536123 295953935804051 428831213103829 3001818491726803 21012729442087621
• Sum of all divisors σ(n): 25063267234996224
• Sum of proper divisors (its aliquot sum) s(n): 4050537792908603
• 21012729442087621 is a deficient number, because the sum of its proper divisors (4050537792908603) is less than itself. Its deficiency is 16962191649179018

Bases of 21012729442087621

• Binary: 1001010101001101111011101010010001010000011001011000101₂
• Hexadecimal: 0x4AA6F7522832C5
• Base-36: 5QWE2N57ZYD

Squares and roots of 21012729442087621

• 21012729442087621 squared (21012729442087621²) is 441534798606375944096882641439641
• 21012729442087621 cubed (21012729442087621³) is 9277851262382424090033801246795186660535904784061
• The square root of 21012729442087621 is 144957681.5559893707
• The cube root of 21012729442087621 is 275948.1517204057

Scales and comparisons

• 21,012,729,442,087,621 seconds is equal to 668,139,799 years, 32 weeks, 1 day, 4 hours, 47 minutes, 1 second.
• To count from 1 to 21,012,729,442,087,621 would take you about two billion, four million, four hundred nineteen thousand, three hundred ninety-eight 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 21012729442087621 cubic inches would be around 22995.7 feet tall.

Recreational maths with 21012729442087621

• 21012729442087621 backwards is 12678024492721012
• The number of decimal digits it has is: 17
• The sum of 21012729442087621's digits is 58
• More coming soon!