18947438293420

Names of 18947438293420

• Cardinal: 18947438293420 can be written as Eighteen trillion, nine hundred forty-seven billion, four hundred thirty-eight million, two hundred ninety-three thousand, four hundred twenty.

Scientific notation

• Scientific notation: 1.894743829342 × 10¹³

Factors of 18947438293420

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 6
• Sum of prime factors: 10410680408

Divisors of 18947438293420

• Number of divisors d(n): 48
• Complete list of divisors:
  1 2 4 5 7 10 13 14 20 26 28 35 52 65 70 91 130 140 182 260 364 455 910 1820 10410680381 20821360762 41642721524 52053401905 72874762667 104106803810 135338844953 145749525334 208213607620 270677689906 291499050668 364373813335 541355379812 676694224765 728747626670 947371914671 1353388449530 1457495253340 1894743829342 2706776899060 3789487658684 4736859573355 9473719146710 18947438293420
• Sum of all divisors σ(n): 48971840516928
• Sum of proper divisors (its aliquot sum) s(n): 30024402223508
• 18947438293420 is an abundant number, because the sum of its proper divisors (30024402223508) is greater than itself. Its abundance is 11076963930088

Bases of 18947438293420

• Binary: 100010011101110001011010101000011000110101100₂
• Hexadecimal: 0x113B8B5431AC
• Base-36: 6PSBZJUSS

Squares and roots of 18947438293420

• 18947438293420 squared (18947438293420²) is 359005417882958602015296400
• 18947438293420 cubed (18947438293420³) is 6802233002340819083469216593951469688000
• The square root of 18947438293420 is 4352865.5266869893
• The cube root of 18947438293420 is 26659.3874910093

Scales and comparisons

• 18,947,438,293,420 seconds is equal to 602,469 years, 48 weeks, 2 days, 7 hours, 43 minutes, 40 seconds.
• To count from 1 to 18,947,438,293,420 would take you about one million, five hundred six thousand, one hundred seventy-four 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 18947438293420 cubic inches would be around 2221.6 feet tall.

Recreational maths with 18947438293420

• 18947438293420 backwards is 02439283474981
• The number of decimal digits it has is: 14
• The sum of 18947438293420's digits is 64
• More coming soon!