21082749013

Names of 21082749013

• Cardinal: 21082749013 can be written as Twenty-one billion, eighty-two million, seven hundred forty-nine thousand and thirteen.

Scientific notation

• Scientific notation: 2.1082749013 × 10¹⁰

Factors of 21082749013

• Number of distinct prime factors ω(n): 2
• Total number of prime factors Ω(n): 4
• Sum of prime factors: 734

Divisors of 21082749013

• Number of divisors d(n): 8
• Complete list of divisors:
  1 73 661 48253 436921 31895233 288804781 21082749013
• Sum of all divisors σ(n): 21403934936
• Sum of proper divisors (its aliquot sum) s(n): 321185923
• 21082749013 is a deficient number, because the sum of its proper divisors (321185923) is less than itself. Its deficiency is 20761563090

Bases of 21082749013

• Binary: 10011101000101000010011100001010101₂
• Hexadecimal: 0x4E8A13855
• Base-36: 9OO4H91

Squares and roots of 21082749013

• 21082749013 squared (21082749013²) is 444482305945152474169
• 21082749013 cubed (21082749013³) is 9370908896961127356920992745197
• The square root of 21082749013 is 145198.9979751925
• The cube root of 21082749013 is 2762.5432088079

Scales and comparisons

• 21,082,749,013 seconds is equal to 670 years, 19 weeks, 7 hours, 10 minutes, 13 seconds.
• To count from 1 to 21,082,749,013 would take you about one thousand, three hundred forty 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 21082749013 cubic inches would be around 230.2 feet tall.

Recreational maths with 21082749013

• 21082749013 backwards is 31094728012
• The number of decimal digits it has is: 11
• The sum of 21082749013's digits is 37
• More coming soon!