21109616989

Names of 21109616989

• Cardinal: 21109616989 can be written as Twenty-one billion, one hundred nine million, six hundred sixteen thousand, nine hundred eighty-nine.

Scientific notation

• Scientific notation: 2.1109616989 × 10¹⁰

Factors of 21109616989

• Number of distinct prime factors ω(n): 2
• Total number of prime factors Ω(n): 2
• Sum of prime factors: 449140834

Divisors of 21109616989

• Number of divisors d(n): 4
• Complete list of divisors:
  1 47 449140787 21109616989
• Sum of all divisors σ(n): 21558757824
• Sum of proper divisors (its aliquot sum) s(n): 449140835
• 21109616989 is a deficient number, because the sum of its proper divisors (449140835) is less than itself. Its deficiency is 20660476154

Bases of 21109616989

• Binary: 10011101010001110110011000101011101₂
• Hexadecimal: 0x4EA3B315D
• Base-36: 9P44CPP

Squares and roots of 21109616989

• 21109616989 squared (21109616989²) is 445615929422277426121
• 21109616989 cubed (21109616989³) is 9406781594301532509515053969669
• The square root of 21109616989 is 145291.4897335697
• The cube root of 21109616989 is 2763.7162442665

Scales and comparisons

• 21,109,616,989 seconds is equal to 671 years, 11 weeks, 3 days, 6 hours, 29 minutes, 49 seconds.
• To count from 1 to 21,109,616,989 would take you about one thousand, three hundred forty-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 21109616989 cubic inches would be around 230.3 feet tall.

Recreational maths with 21109616989

• 21109616989 backwards is 98961690112
• The number of decimal digits it has is: 11
• The sum of 21109616989's digits is 52
• More coming soon!