18891343464721

Names of 18891343464721

• Cardinal: 18891343464721 can be written as Eighteen trillion, eight hundred ninety-one billion, three hundred forty-three million, four hundred sixty-four thousand, seven hundred twenty-one.

Scientific notation

• Scientific notation: 1.8891343464721 × 10¹³

Factors of 18891343464721

• Number of distinct prime factors ω(n): 7
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 745

Divisors of 18891343464721

• Number of divisors d(n): 192
• Complete list of divisors:
  1 7 13 43 49 91 97 163 181 241 301 559 637 679 1141 1261 1267 1687 2107 2119 2353 3133 3913 4171 4753 7009 7783 7987 8827 8869 10363 11809 14833 15811 16471 17557 21931 23377 27391 29197 29503 39283 43621 49063 54223 54481 61789 72541 91117 101179 103831 110677 115297 122899 134719 153517 163639 204379 205543 206521 228241 274981 303901 305347 343441 379561 381367 383539 507787 510679 567073 637819 679873 708253 754951 774739 860293 943033 1005211 1145473 1268629 1438801 1445647 1597687 1689169 1875703 1924867 2127307 2137429 2656927 2684773 2861791 3574753 3810451 3969511 4231237 4464733 4759111 4957771 5284657 6601231 7036477 7110223 8838349 8880403 9814363 10071607 11183809 11824183 13067743 13129921 14891149 16492177 18793411 20032537 21959197 24384139 25023271 26673157 27786577 29618659 33313777 36992599 37203283 49255339 49535863 49771561 55006081 61868443 62162821 68700541 82769281 91474201 91909447 92432899 115445239 123057013 140227759 153714379 163849393 170688973 181943191 186712099 207330613 260422981 305739589 346751041 348400927 385042567 433079101 480903787 640319407 647030293 689691631 808116673 861399091 1076000653 1146945751 1194822811 1273602337 1599741169 1822960867 2130042109 2140177123 2365261483 2427257287 2695297969 3974614657 4529212051 4827841417 6029793637 8028620257 8915216359 8965991203 11198188183 14910294763 14981239861 16556830381 27822302599 29656740133 33794889919 62761938421 78387317281 104372063341 115897812667 194756118193 207597180931 385537621729 439333568947 1453180266517 2698763352103 18891343464721
• Sum of all divisors σ(n): 24854912898816
• Sum of proper divisors (its aliquot sum) s(n): 5963569434095
• 18891343464721 is a deficient number, because the sum of its proper divisors (5963569434095) is less than itself. Its deficiency is 12927774030626

Bases of 18891343464721

• Binary: 100010010111001111011110100010000100100010001₂
• Hexadecimal: 0x112E7BD10911
• Base-36: 6P2KA4ZYP

Squares and roots of 18891343464721

• 18891343464721 squared (18891343464721²) is 356882857902056836571607841
• 18891343464721 cubed (18891343464721³) is 6741996645298974712270942934214630477361
• The square root of 18891343464721 is 4346417.3136873315
• The cube root of 18891343464721 is 26633.0526733987

Scales and comparisons

• 18,891,343,464,721 seconds is equal to 600,686 years, 14 weeks, 6 days, 14 hours, 52 minutes, 1 second.
• To count from 1 to 18,891,343,464,721 would take you about one million, five hundred one thousand, seven hundred fifteen 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 18891343464721 cubic inches would be around 2219.4 feet tall.

Recreational maths with 18891343464721

• 18891343464721 backwards is 12746434319881
• The number of decimal digits it has is: 14
• The sum of 18891343464721's digits is 61
• More coming soon!