21427791385

Names of 21427791385

• Cardinal: 21427791385 can be written as Twenty-one billion, four hundred twenty-seven million, seven hundred ninety-one thousand, three hundred eighty-five.

Scientific notation

• Scientific notation: 2.1427791385 × 10¹⁰

Factors of 21427791385

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 10
• Sum of prime factors: 83

Divisors of 21427791385

• Number of divisors d(n): 192
• Complete list of divisors:
  1 5 7 11 13 35 47 49 55 65 77 91 121 143 169 235 245 329 343 385 455 517 539 605 611 637 715 845 847 1001 1183 1573 1645 1715 1859 2197 2303 2585 2695 3055 3185 3619 3773 4235 4277 4459 5005 5687 5915 5929 6721 7007 7865 7943 8281 9295 10985 11011 11515 13013 15379 16121 18095 18865 20449 21385 22295 24167 25333 28435 29645 29939 33605 35035 39715 39809 41405 41503 47047 49049 55055 55601 57967 65065 73931 76895 77077 80605 87373 91091 102245 103259 107653 120835 126665 143143 149695 169169 177331 199045 207515 209573 235235 245245 265837 278005 278663 289835 329329 369655 385385 389207 436865 455455 516295 517517 538265 539539 611611 637637 715715 722813 753571 845845 886655 961103 1002001 1047865 1135849 1184183 1329185 1393315 1646645 1860859 1946035 1950641 2305303 2587585 2697695 2724449 3058055 3188185 3614065 3622619 3767855 4281277 4805515 5010005 5059691 5679245 5920915 6727721 7014007 7950943 8289281 9304295 9753205 11526515 12494339 13026013 13622245 18113095 21406385 25298455 25358333 29968939 33638605 35070035 35417837 39754715 41446405 47094047 55656601 62471695 65130065 87460373 91182091 126791665 149844695 177089185 235470235 278283005 329658329 389596207 437301865 455910455 612222611 1648291645 1947981035 3061113055 4285558277 21427791385
• Sum of all divisors σ(n): 36465408000
• Sum of proper divisors (its aliquot sum) s(n): 15037616615
• 21427791385 is a deficient number, because the sum of its proper divisors (15037616615) is less than itself. Its deficiency is 6390174770

Bases of 21427791385

• Binary: 10011111101001100100010011000011001₂
• Hexadecimal: 0x4FD322619
• Base-36: 9UDJXND

Squares and roots of 21427791385

• 21427791385 squared (21427791385²) is 459150243639080218225
• 21427791385 cubed (21427791385³) is 9838575635070134149405574991625
• The square root of 21427791385 is 146382.3465620087
• The cube root of 21427791385 is 2777.5324180119

Scales and comparisons

• 21,427,791,385 seconds is equal to 681 years, 17 weeks, 3 days, 20 hours, 16 minutes, 25 seconds.
• To count from 1 to 21,427,791,385 would take you about one thousand, three hundred sixty-two 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 21427791385 cubic inches would be around 231.5 feet tall.

Recreational maths with 21427791385

• 21427791385 backwards is 58319772412
• 21427791385 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 21427791385's digits is 49
• More coming soon!