21949455

Names of 21949455

• Cardinal: 21949455 can be written as Twenty-one million, nine hundred forty-nine thousand, four hundred fifty-five.

Scientific notation

• Scientific notation: 2.1949455 × 10⁷

Factors of 21949455

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 5
• Sum of prime factors: 1127

Divisors of 21949455

• Number of divisors d(n): 32
• Complete list of divisors:
  1 3 5 11 15 33 55 137 165 411 685 971 1507 2055 2913 4521 4855 7535 10681 14565 22605 32043 53405 133027 160215 399081 665135 1463297 1995405 4389891 7316485 21949455
• Sum of all divisors σ(n): 38631168
• Sum of proper divisors (its aliquot sum) s(n): 16681713
• 21949455 is a deficient number, because the sum of its proper divisors (16681713) is less than itself. Its deficiency is 5267742

Bases of 21949455

• Binary: 1010011101110110000001111₂
• Hexadecimal: 0x14EEC0F
• Base-36: D2GB3

Squares and roots of 21949455

• 21949455 squared (21949455²) is 481778574797025
• 21949455 cubed (21949455³) is 10574777147471434371375
• The square root of 21949455 is 4685.0245463605
• The cube root of 21949455 is 279.9891790035

Scales and comparisons

• 21,949,455 seconds is equal to 36 weeks, 2 days, 1 hour, 4 minutes, 15 seconds.
• To count from 1 to 21,949,455 would take you about two weeks!

  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 21949455 cubic inches would be around 23.3 feet tall.

Recreational maths with 21949455

• 21949455 backwards is 55494912
• The number of decimal digits it has is: 8
• The sum of 21949455's digits is 39
• More coming soon!