2001121805

Names of 2001121805

• Cardinal: 2001121805 can be written as Two billion, one million, one hundred twenty-one thousand, eight hundred five.

Scientific notation

• Scientific notation: 2.001121805 × 10⁹

Factors of 2001121805

• Number of distinct prime factors ω(n): 2
• Total number of prime factors Ω(n): 2
• Sum of prime factors: 400224366

Divisors of 2001121805

• Number of divisors d(n): 4
• Complete list of divisors:
  1 5 400224361 2001121805
• Sum of all divisors σ(n): 2401346172
• Sum of proper divisors (its aliquot sum) s(n): 400224367
• 2001121805 is a deficient number, because the sum of its proper divisors (400224367) is less than itself. Its deficiency is 1600897438

Bases of 2001121805

• Binary: 1110111010001101011001000001101₂
• Hexadecimal: 0x7746B20D
• Base-36: X3EZGT

Squares and roots of 2001121805

• 2001121805 squared (2001121805²) is 4004488478446458025
• 2001121805 cubed (2001121805³) is 8013469212090479678844735125
• The square root of 2001121805 is 44733.8999529439
• The cube root of 2001121805 is 1260.1565701547

Scales and comparisons

• 2,001,121,805 seconds is equal to 63 years, 32 weeks, 5 days, 3 hours, 10 minutes, 5 seconds.
• To count from 1 to 2,001,121,805 would take you about one hundred twenty-seven 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 2001121805 cubic inches would be around 105 feet tall.

Recreational maths with 2001121805

• 2001121805 backwards is 5081211002
• The number of decimal digits it has is: 10
• The sum of 2001121805's digits is 20
• More coming soon!