21155574721350388

Names of 21155574721350388

• Cardinal: 21155574721350388 can be written as Twenty-one quadrillion, one hundred fifty-five trillion, five hundred seventy-four billion, seven hundred twenty-one million, three hundred fifty thousand, three hundred eighty-eight.

Scientific notation

• Scientific notation: 2.1155574721350388 × 10¹⁶

Factors of 21155574721350388

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 6
• Sum of prime factors: 598765275795

Divisors of 21155574721350388

• Number of divisors d(n): 36
• Complete list of divisors:
  1 2 4 11 22 44 73 121 146 242 292 484 803 1606 3212 8833 17666 35332 598765275709 1197530551418 2395061102836 6586418032799 13172836065598 26345672131196 43709865126757 72450598360789 87419730253514 144901196721578 174839460507028 289802393443156 480808516394327 961617032788654 1923234065577308 5288893680337597 10577787360675194 21155574721350388
• Sum of all divisors σ(n): 41251334904764740
• Sum of proper divisors (its aliquot sum) s(n): 20095760183414352
• 21155574721350388 is a deficient number, because the sum of its proper divisors (20095760183414352) is less than itself. Its deficiency is 1059814537936036

Bases of 21155574721350388

• Binary: 1001011001010001110001000010100010010010000101011110100₂
• Hexadecimal: 0x4B28E214490AF4
• Base-36: 5SB0WUWC7W4

Squares and roots of 21155574721350388

• 21155574721350388 squared (21155574721350388²) is 447558341790639546871806267750544
• 21155574721350388 cubed (21155574721350388³) is 9468353941915550944487417915182084634942801611072
• The square root of 21155574721350388 is 145449560.7465020431
• The cube root of 21155574721350388 is 276572.0418773151

Scales and comparisons

• 21,155,574,721,350,388 seconds is equal to 672,681,837 years, 33 weeks, 5 days, 12 hours, 26 minutes, 28 seconds.
• To count from 1 to 21,155,574,721,350,388 would take you about two billion, eighteen million, forty-five thousand, five hundred twelve 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 21155574721350388 cubic inches would be around 23047.7 feet tall.

Recreational maths with 21155574721350388

• 21155574721350388 backwards is 88305312747555112
• The number of decimal digits it has is: 17
• The sum of 21155574721350388's digits is 67
• More coming soon!