21538427715

Names of 21538427715

• Cardinal: 21538427715 can be written as Twenty-one billion, five hundred thirty-eight million, four hundred twenty-seven thousand, seven hundred fifteen.

Scientific notation

• Scientific notation: 2.1538427715 × 10¹⁰

Factors of 21538427715

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 10
• Sum of prime factors: 508

Divisors of 21538427715

• Number of divisors d(n): 192
• Complete list of divisors:
  1 3 5 7 9 15 21 27 35 45 63 73 81 105 113 135 189 219 243 307 315 339 365 405 511 565 567 657 791 921 945 1017 1095 1215 1533 1535 1695 1701 1971 2149 2373 2555 2763 2835 3051 3285 3955 4599 4605 5085 5913 6447 7119 7665 8249 8289 8505 9153 9855 10745 11865 13797 13815 15255 17739 19341 21357 22411 22995 24747 24867 27459 29565 32235 34691 35595 41245 41391 41445 45765 57743 58023 64071 67233 68985 74241 74601 88695 96705 104073 106785 112055 123735 124173 124335 137295 156877 173229 173455 174069 192213 201699 206955 222723 242837 288715 290115 312219 320355 336165 371205 373005 470631 519687 520365 522207 605097 620865 668169 728511 784385 866145 870345 936657 961065 1008495 1113615 1214185 1411893 1559061 1561095 1815291 2004507 2185533 2353155 2532443 2598435 2611035 2809971 3025485 3340845 3642555 4235679 4677183 4683285 5445873 6556599 7059465 7597329 7795305 8429913 9076455 10022535 10927665 12662215 12707037 14031549 14049855 17727101 19669797 21178395 22791987 23385915 27229365 32782995 37986645 38121111 42149565 53181303 59009391 63535185 68375961 70157745 88635505 98348985 113959935 159543909 190605555 205127883 265906515 295046955 341879805 478631727 615383649 797719545 1025639415 1435895181 2393158635 3076918245 4307685543 7179475905 21538427715
• Sum of all divisors σ(n): 45397287936
• Sum of proper divisors (its aliquot sum) s(n): 23858860221
• 21538427715 is an abundant number, because the sum of its proper divisors (23858860221) is greater than itself. Its abundance is 2320432506

Bases of 21538427715

• Binary: 10100000011110010100101001101000011₂
• Hexadecimal: 0x503CA5343
• Base-36: 9W7F96R

Squares and roots of 21538427715

• 21538427715 squared (21538427715²) is 463903868434280121225
• 21538427715 cubed (21538427715³) is 9991759936980612619066099750875
• The square root of 21538427715 is 146759.7619070023
• The cube root of 21538427715 is 2782.3045481387

Scales and comparisons

• 21,538,427,715 seconds is equal to 684 years, 44 weeks, 3 days, 8 hours, 35 minutes, 15 seconds.
• To count from 1 to 21,538,427,715 would take you about one thousand, three hundred sixty-nine 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 21538427715 cubic inches would be around 231.9 feet tall.

Recreational maths with 21538427715

• 21538427715 backwards is 51772483512
• 21538427715 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 21538427715's digits is 45
• More coming soon!