21216215843405

Names of 21216215843405

• Cardinal: 21216215843405 can be written as Twenty-one trillion, two hundred sixteen billion, two hundred fifteen million, eight hundred forty-three thousand, four hundred five.

Scientific notation

• Scientific notation: 2.1216215843405 × 10¹³

Factors of 21216215843405

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 6
• Sum of prime factors: 181779

Divisors of 21216215843405

• Number of divisors d(n): 48
• Complete list of divisors:
  1 5 11 55 61 121 305 605 671 3221 3355 7381 16105 35431 36905 177155 178481 196481 389741 892405 982405 1948705 1963291 2161291 9816455 10806455 10887341 21596201 23774201 54436705 107981005 118871005 119760751 574887301 598803755 1317368261 2874436505 6323760311 6586841305 31618801555 35068125361 69561363421 175340626805 347806817105 385749378971 1928746894855 4243243168681 21216215843405
• Sum of all divisors σ(n): 28452114041904
• Sum of proper divisors (its aliquot sum) s(n): 7235898198499
• 21216215843405 is a deficient number, because the sum of its proper divisors (7235898198499) is less than itself. Its deficiency is 13980317644906

Bases of 21216215843405

• Binary: 100110100101111001001000000100100001001001101₂
• Hexadecimal: 0x134BC902424D
• Base-36: 7IQLF4K7H

Squares and roots of 21216215843405

• 21216215843405 squared (21216215843405²) is 450127814713949335481994025
• 21216215843405 cubed (21216215843405³) is 9550008874091362169511553155306545655125
• The square root of 21216215843405 is 4606106.3647515783
• The cube root of 21216215843405 is 27683.6048562563

Scales and comparisons

• 21,216,215,843,405 seconds is equal to 674,610 years, 1 week, 6 days, 17 hours, 50 minutes, 5 seconds.
• To count from 1 to 21,216,215,843,405 would take you about one million, six hundred eighty-six thousand, five hundred twenty-five 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 21216215843405 cubic inches would be around 2307 feet tall.

Recreational maths with 21216215843405

• 21216215843405 backwards is 50434851261212
• The number of decimal digits it has is: 14
• The sum of 21216215843405's digits is 44
• More coming soon!