21171842356754921

Names of 21171842356754921

• Cardinal: 21171842356754921 can be written as Twenty-one quadrillion, one hundred seventy-one trillion, eight hundred forty-two billion, three hundred fifty-six million, seven hundred fifty-four thousand, nine hundred twenty-one.

Scientific notation

• Scientific notation: 2.1171842356754921 × 10¹⁶

Factors of 21171842356754921

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 719

Divisors of 21171842356754921

• Number of divisors d(n): 40
• Complete list of divisors:
  1 13 53 169 653 689 2197 8489 8957 34609 110357 116441 426409 449917 1434641 5543317 5848921 22599677 72063121 76035973 278445077 293795801 936820573 3619786001 3819345413 14757589081 47057218013 49651490369 181824635281 191848658053 611743834169 2363720258653 2494032554689 9636705669893 30728363362489 32422423210957 125277173708609 399468723712357 1628603258211917 21171842356754921
• Sum of all divisors σ(n): 23403942773746920
• Sum of proper divisors (its aliquot sum) s(n): 2232100416991999
• 21171842356754921 is a deficient number, because the sum of its proper divisors (2232100416991999) is less than itself. Its deficiency is 18939741939762922

Bases of 21171842356754921

• Binary: 1001011001101111010110110101110111010100011100111101001₂
• Hexadecimal: 0x4B37ADAEEA39E9
• Base-36: 5SGSI3UFW15

Squares and roots of 21171842356754921

• 21171842356754921 squared (21171842356754921²) is 448246908779281767543037657716241
• 21171842356754921 cubed (21171842356754921³) is 9490212889577656985948794905775098964504598371961
• The square root of 21171842356754921 is 145505471.9134470249
• The cube root of 21171842356754921 is 276642.9139835241

Scales and comparisons

• 21,171,842,356,754,921 seconds is equal to 673,199,098 years, 7 weeks, 16 hours, 48 minutes, 41 seconds.
• To count from 1 to 21,171,842,356,754,921 would take you about two billion, nineteen million, five hundred ninety-seven thousand, two hundred ninety-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 21171842356754921 cubic inches would be around 23053.6 feet tall.

Recreational maths with 21171842356754921

• 21171842356754921 backwards is 12945765324817112
• The number of decimal digits it has is: 17
• The sum of 21171842356754921's digits is 68
• More coming soon!