21004270191

Names of 21004270191

• Cardinal: 21004270191 can be written as Twenty-one billion, four million, two hundred seventy thousand, one hundred ninety-one.

Scientific notation

• Scientific notation: 2.1004270191 × 10¹⁰

Factors of 21004270191

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 390

Divisors of 21004270191

• Number of divisors d(n): 64
• Complete list of divisors:
  1 3 9 27 29 87 167 191 261 501 573 783 841 1503 1719 2523 4509 4843 5157 5539 7569 14529 16617 22707 24389 31897 43587 49851 73167 95691 130761 140447 149553 160631 219501 287073 421341 481893 658503 861219 925013 1264023 1445679 2775039 3792069 4072963 4337037 4658299 8325117 12218889 13974897 24975351 26825377 36656667 41924691 80476131 109970001 125774073 241428393 724285179 777935933 2333807799 7001423397 21004270191
• Sum of all divisors σ(n): 32591462400
• Sum of proper divisors (its aliquot sum) s(n): 11587192209
• 21004270191 is a deficient number, because the sum of its proper divisors (11587192209) is less than itself. Its deficiency is 9417077982

Bases of 21004270191

• Binary: 10011100011111100111011101001101111₂
• Hexadecimal: 0x4E3F3BA6F
• Base-36: 9NDEELR

Squares and roots of 21004270191

• 21004270191 squared (21004270191²) is 441179366256531176481
• 21004270191 cubed (21004270191³) is 9266650611546329049222028577871
• The square root of 21004270191 is 144928.5002716859
• The cube root of 21004270191 is 2759.1111658211

Scales and comparisons

• 21,004,270,191 seconds is equal to 667 years, 45 weeks, 1 day, 23 hours, 29 minutes, 51 seconds.
• To count from 1 to 21,004,270,191 would take you about one thousand, three hundred thirty-five 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 21004270191 cubic inches would be around 229.9 feet tall.

Recreational maths with 21004270191

• 21004270191 backwards is 19107240012
• 21004270191 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 21004270191's digits is 27
• More coming soon!