19918404090

Names of 19918404090

• Cardinal: 19918404090 can be written as Nineteen billion, nine hundred eighteen million, four hundred four thousand and ninety.

Scientific notation

• Scientific notation: 1.991840409 × 10¹⁰

Factors of 19918404090

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 7
• Sum of prime factors: 5674782

Divisors of 19918404090

• Number of divisors d(n): 64
• Complete list of divisors:
  1 2 3 5 6 9 10 13 15 18 26 27 30 39 45 54 65 78 90 117 130 135 195 234 270 351 390 585 702 1170 1755 3510 5674759 11349518 17024277 28373795 34048554 51072831 56747590 73771867 85121385 102145662 147543734 153218493 170242770 221315601 255364155 306436986 368859335 442631202 510728310 663946803 737718670 766092465 1106578005 1327893606 1532184930 1991840409 2213156010 3319734015 3983680818 6639468030 9959202045 19918404090
• Sum of all divisors σ(n): 57201580800
• Sum of proper divisors (its aliquot sum) s(n): 37283176710
• 19918404090 is an abundant number, because the sum of its proper divisors (37283176710) is greater than itself. Its abundance is 17364772620

Bases of 19918404090

• Binary: 10010100011001110101011100111111010₂
• Hexadecimal: 0x4A33AB9FA
• Base-36: 95EWIYI

Squares and roots of 19918404090

• 19918404090 squared (19918404090²) is 396742821492528728100
• 19918404090 cubed (19918404090³) is 7902483838294924122229537929000
• The square root of 19918404090 is 141132.5762891049
• The cube root of 19918404090 is 2710.7211621763

Scales and comparisons

• 19,918,404,090 seconds is equal to 633 years, 17 weeks, 6 days, 2 hours, 1 minute, 30 seconds.
• To count from 1 to 19,918,404,090 would take you about one thousand, two hundred sixty-six 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 19918404090 cubic inches would be around 225.9 feet tall.

Recreational maths with 19918404090

• 19918404090 backwards is 09040481991
• 19918404090 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 19918404090's digits is 45
• More coming soon!