21788172137221

Names of 21788172137221

• Cardinal: 21788172137221 can be written as Twenty-one trillion, seven hundred eighty-eight billion, one hundred seventy-two million, one hundred thirty-seven thousand, two hundred twenty-one.

Scientific notation

• Scientific notation: 2.1788172137221 × 10¹³

Factors of 21788172137221

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 7
• Sum of prime factors: 1609793

Divisors of 21788172137221

• Number of divisors d(n): 64
• Complete list of divisors:
  1 7 19 31 49 67 133 217 343 469 589 931 1273 1519 2077 3283 4123 6517 8911 10633 14539 22981 28861 39463 62377 101773 202027 276241 436639 712411 1609669 1933687 11267683 13535809 30583711 49899739 78873781 107847823 214085977 349298173 552116467 754934761 948095041 1498601839 2049108637 2445087211 3343282513 5284543327 6636665287 10490212873 14343760459 17115610477 23402977591 36991803289 46456657009 63522367747 100406323213 163820843137 325196599063 444656574229 702844262491 1146745901959 3112596019603 21788172137221
• Sum of all divisors σ(n): 28021135360000
• Sum of proper divisors (its aliquot sum) s(n): 6232963222779
• 21788172137221 is a deficient number, because the sum of its proper divisors (6232963222779) is less than itself. Its deficiency is 15555208914442

Bases of 21788172137221

• Binary: 100111101000011110100010000101011001100000101₂
• Hexadecimal: 0x13D0F442B305
• Base-36: 7Q1CJ4WZP

Squares and roots of 21788172137221

• 21788172137221 squared (21788172137221²) is 474724445081173518853602841
• 21788172137221 cubed (21788172137221³) is 10343377927175325669111252950006887444861
• The square root of 21788172137221 is 4667780.2151794807
• The cube root of 21788172137221 is 27930.1712966381

Scales and comparisons

• 21,788,172,137,221 seconds is equal to 692,796 years, 24 weeks, 6 days, 6 hours, 7 minutes, 1 second.
• To count from 1 to 21,788,172,137,221 would take you about one million, seven hundred thirty-one thousand, nine hundred ninety-one 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 21788172137221 cubic inches would be around 2327.5 feet tall.

Recreational maths with 21788172137221

• 21788172137221 backwards is 12273127188712
• The number of decimal digits it has is: 14
• The sum of 21788172137221's digits is 52
• More coming soon!