21423993549

Names of 21423993549

• Cardinal: 21423993549 can be written as Twenty-one billion, four hundred twenty-three million, nine hundred ninety-three thousand, five hundred forty-nine.

Scientific notation

• Scientific notation: 2.1423993549 × 10¹⁰

Factors of 21423993549

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 6
• Sum of prime factors: 870

Divisors of 21423993549

• Number of divisors d(n): 64
• Complete list of divisors:
  1 3 7 21 61 173 183 277 349 427 519 831 1047 1211 1281 1939 2443 3633 5817 7329 10553 16897 21289 31659 47921 50691 60377 63867 73871 96673 118279 143763 149023 181131 221613 290019 335447 354837 422639 447069 676711 1006341 1267917 2030133 2923181 3682997 5897053 8769543 11048991 16724429 17691159 20462267 25780979 41279371 50173287 61386801 77342937 117071003 123838113 351213009 1020190169 3060570507 7141331183 21423993549
• Sum of all divisors σ(n): 33589516800
• Sum of proper divisors (its aliquot sum) s(n): 12165523251
• 21423993549 is a deficient number, because the sum of its proper divisors (12165523251) is less than itself. Its deficiency is 9258470298

Bases of 21423993549

• Binary: 10011111100111110000011001011001101₂
• Hexadecimal: 0x4FCF832CD
• Base-36: 9UBAJ7X

Squares and roots of 21423993549

• 21423993549 squared (21423993549²) is 458987499587593615401
• 21423993549 cubed (21423993549³) is 9833345230236245776784611048149
• The square root of 21423993549 is 146369.3736715437
• The cube root of 21423993549 is 2777.3683128135

Scales and comparisons

• 21,423,993,549 seconds is equal to 681 years, 11 weeks, 1 day, 21 hours, 19 minutes, 9 seconds.
• To count from 1 to 21,423,993,549 would take you about one thousand, three hundred sixty-two 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 21423993549 cubic inches would be around 231.4 feet tall.

Recreational maths with 21423993549

• 21423993549 backwards is 94539932412
• The number of decimal digits it has is: 11
• The sum of 21423993549's digits is 51
• More coming soon!