18153742647743821

Names of 18153742647743821

• Cardinal: 18153742647743821 can be written as Eighteen quadrillion, one hundred fifty-three trillion, seven hundred forty-two billion, six hundred forty-seven million, seven hundred forty-three thousand, eight hundred twenty-one.

Scientific notation

• Scientific notation: 1.8153742647743821 × 10¹⁶

Factors of 18153742647743821

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 4
• Sum of prime factors: 13745076

Divisors of 18153742647743821

• Number of divisors d(n): 16
• Complete list of divisors:
  1 41 73 2993 456439 13288523 18713999 33320047 544829443 970062179 1366121927 39772549339 6065400149597 248681406133477 442774210920581 18153742647743821
• Sum of all divisors σ(n): 18851306384292480
• Sum of proper divisors (its aliquot sum) s(n): 697563736548659
• 18153742647743821 is a deficient number, because the sum of its proper divisors (697563736548659) is less than itself. Its deficiency is 17456178911195162

Bases of 18153742647743821

• Binary: 1000000011111101011101110010101110111001101010101001101₂
• Hexadecimal: 0x407EBB95DCD54D
• Base-36: 4YQYQ8OPYZ1

Squares and roots of 18153742647743821

• 18153742647743821 squared (18153742647743821²) is 329558372120512836628421643680041
• 18153742647743821 cubed (18153742647743821³) is 5982717874885182143721373663825987539832258776661
• The square root of 18153742647743821 is 134735825.4056574997
• The cube root of 18153742647743821 is 262818.1727291263

Scales and comparisons

• 18,153,742,647,743,821 seconds is equal to 577,232,862 years, 51 weeks, 1 day, 15 hours, 57 minutes, 1 second.
• To count from 1 to 18,153,742,647,743,821 would take you about one billion, seven hundred thirty-one million, six hundred ninety-eight thousand, five hundred eighty-eight 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 18153742647743821 cubic inches would be around 21901.5 feet tall.

Recreational maths with 18153742647743821

• 18153742647743821 backwards is 12834774624735181
• 18153742647743821 is a Harshad number.
• The number of decimal digits it has is: 17
• The sum of 18153742647743821's digits is 73
• More coming soon!