21499842749

Names of 21499842749

• Cardinal: 21499842749 can be written as Twenty-one billion, four hundred ninety-nine million, eight hundred forty-two thousand, seven hundred forty-nine.

Scientific notation

• Scientific notation: 2.1499842749 × 10¹⁰

Factors of 21499842749

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 6
• Sum of prime factors: 48903

Divisors of 21499842749

• Number of divisors d(n): 48
• Complete list of divisors:
  1 7 11 19 43 49 77 133 209 301 473 539 817 931 1463 2107 3311 5719 8987 10241 23177 40033 48823 62909 341761 440363 537053 927637 2099389 2392327 3759371 6493459 10204007 14695723 23093279 26315597 39888391 45454213 71428049 102870061 161652953 279218737 438772301 499996343 1131570671 1954531159 3071406107 21499842749
• Sum of all divisors σ(n): 29388142080
• Sum of proper divisors (its aliquot sum) s(n): 7888299331
• 21499842749 is a deficient number, because the sum of its proper divisors (7888299331) is less than itself. Its deficiency is 13611543418

Bases of 21499842749

• Binary: 10100000001011111011001000010111101₂
• Hexadecimal: 0x5017D90BD
• Base-36: 9VKG8U5

Squares and roots of 21499842749

• 21499842749 squared (21499842749²) is 462243238231727877001
• 21499842749 cubed (21499842749³) is 9938156933770694178081113715749
• The square root of 21499842749 is 146628.2467637119
• The cube root of 21499842749 is 2780.6421040219

Scales and comparisons

• 21,499,842,749 seconds is equal to 683 years, 32 weeks, 4 days, 18 hours, 32 minutes, 29 seconds.
• To count from 1 to 21,499,842,749 would take you about one thousand, three hundred sixty-seven 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 21499842749 cubic inches would be around 231.7 feet tall.

Recreational maths with 21499842749

• 21499842749 backwards is 94724899412
• The number of decimal digits it has is: 11
• The sum of 21499842749's digits is 59
• More coming soon!