13668181921

Names of 13668181921

• Cardinal: 13668181921 can be written as Thirteen billion, six hundred sixty-eight million, one hundred eighty-one thousand, nine hundred twenty-one.

Scientific notation

• Scientific notation: 1.3668181921 × 10¹⁰

Factors of 13668181921

• Number of distinct prime factors ω(n): 1
• Total number of prime factors Ω(n): 2
• Sum of prime factors: 116911

Divisors of 13668181921

• Number of divisors d(n): 3
• Complete list of divisors:
  1 116911 13668181921
• Sum of all divisors σ(n): 13668298833
• Sum of proper divisors (its aliquot sum) s(n): 116912
• 13668181921 is a deficient number, because the sum of its proper divisors (116912) is less than itself. Its deficiency is 13668065009

Bases of 13668181921

• Binary: 1100101110101011111110011110100001₂
• Hexadecimal: 0x32EAFE7A1
• Base-36: 6A1OKO1

Squares and roots of 13668181921

• 13668181921 squared (13668181921²) is 186819197025551250241
• 13668181921 cubed (13668181921³) is 2553478771280376573602983092961
• 13668181921 is a perfect square number. Its square root is 116911
• The cube root of 13668181921 is 2390.9486567991

Scales and comparisons

• 13,668,181,921 seconds is equal to 434 years, 31 weeks, 3 days, 13 hours, 12 minutes, 1 second.
• To count from 1 to 13,668,181,921 would take you about eight hundred sixty-nine 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 13668181921 cubic inches would be around 199.2 feet tall.

Recreational maths with 13668181921

• 13668181921 backwards is 12918186631
• The number of decimal digits it has is: 11
• The sum of 13668181921's digits is 46
• More coming soon!