18121819

Names of 18121819

• Cardinal: 18121819 can be written as Eighteen million, one hundred twenty-one thousand, eight hundred nineteen.

Scientific notation

• Scientific notation: 1.8121819 × 10⁷

Factors of 18121819

• Number of distinct prime factors ω(n): 2
• Total number of prime factors Ω(n): 2
• Sum of prime factors: 297140

Divisors of 18121819

• Number of divisors d(n): 4
• Complete list of divisors:
  1 61 297079 18121819
• Sum of all divisors σ(n): 18418960
• Sum of proper divisors (its aliquot sum) s(n): 297141
• 18121819 is a deficient number, because the sum of its proper divisors (297141) is less than itself. Its deficiency is 17824678

Bases of 18121819

• Binary: 1000101001000010001011011₂
• Hexadecimal: 0x114845B
• Base-36: ASEVV

Squares and roots of 18121819

• 18121819 squared (18121819²) is 328400323868761
• 18121819 cubed (18121819³) is 5951211228691066596259
• The square root of 18121819 is 4256.9729855849
• The cube root of 18121819 is 262.6640256793

Scales and comparisons

• 18,121,819 seconds is equal to 29 weeks, 6 days, 17 hours, 50 minutes, 19 seconds.
• To count from 1 to 18,121,819 would take you about forty-four 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 18121819 cubic inches would be around 21.9 feet tall.

Recreational maths with 18121819

• 18121819 backwards is 91812181
• The number of decimal digits it has is: 8
• The sum of 18121819's digits is 31
• More coming soon!