18649712390

Names of 18649712390

• Cardinal: 18649712390 can be written as Eighteen billion, six hundred forty-nine million, seven hundred twelve thousand, three hundred ninety.

Scientific notation

• Scientific notation: 1.864971239 × 10¹⁰

Factors of 18649712390

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 6
• Sum of prime factors: 19557

Divisors of 18649712390

• Number of divisors d(n): 64
• Complete list of divisors:
  1 2 5 10 19 38 61 83 95 122 166 190 305 415 610 830 1159 1577 2318 3154 5063 5795 7885 10126 11590 15770 19387 25315 38774 50630 96197 96935 192394 193870 368353 480985 736706 961970 1182607 1609121 1841765 2365214 3218242 3683530 5913035 8045605 11826070 16091210 22469533 30573299 44939066 61146598 98156381 112347665 152866495 196312762 224695330 305732990 490781905 981563810 1864971239 3729942478 9324856195 18649712390
• Sum of all divisors σ(n): 36350173440
• Sum of proper divisors (its aliquot sum) s(n): 17700461050
• 18649712390 is a deficient number, because the sum of its proper divisors (17700461050) is less than itself. Its deficiency is 949251340

Bases of 18649712390

• Binary: 10001010111100111000000011100000110₂
• Hexadecimal: 0x4579C0706
• Base-36: 8KFK26E

Squares and roots of 18649712390

• 18649712390 squared (18649712390²) is 347811772229719512100
• 18649712390 cubed (18649712390³) is 6486589517940457911036124919000
• The square root of 18649712390 is 136563.9498183909
• The cube root of 18649712390 is 2651.9014425077

Scales and comparisons

• 18,649,712,390 seconds is equal to 593 years, 1 day, 3 hours, 39 minutes, 50 seconds.
• To count from 1 to 18,649,712,390 would take you about one thousand, one hundred eighty-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 18649712390 cubic inches would be around 221 feet tall.

Recreational maths with 18649712390

• 18649712390 backwards is 09321794681
• The number of decimal digits it has is: 11
• The sum of 18649712390's digits is 50
• More coming soon!