21918270379491

Names of 21918270379491

• Cardinal: 21918270379491 can be written as Twenty-one trillion, nine hundred eighteen billion, two hundred seventy million, three hundred seventy-nine thousand, four hundred ninety-one.

Scientific notation

• Scientific notation: 2.1918270379491 × 10¹³

Factors of 21918270379491

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 12
• Sum of prime factors: 307

Divisors of 21918270379491

• Number of divisors d(n): 288
• Complete list of divisors:
  1 3 9 17 27 29 51 67 81 87 153 191 201 243 261 289 459 493 573 603 783 841 867 1139 1377 1479 1719 1809 1943 2349 2523 2601 3247 3417 4131 4437 5157 5427 5539 5829 7047 7569 7803 8381 9741 10251 12797 13311 14297 15471 16281 16617 17487 19363 22707 23409 24389 25143 29223 30753 33031 38391 39933 42891 46413 49851 52461 55199 56347 58089 68121 70227 73167 75429 87669 92259 94163 99093 115173 119799 128673 149553 157383 160631 165597 169041 174267 204363 217549 219501 226287 243049 263007 276777 282489 297279 345519 371113 386019 414613 448659 472149 481893 496791 507123 522801 561527 652647 658503 678861 729147 789021 847467 891837 957899 1036557 1113339 1158057 1243839 1345977 1445679 1490373 1521369 1568403 1600771 1634063 1684581 1957941 1975509 2036583 2187441 2542401 2675511 2730727 2873697 3109671 3340017 3474171 3698333 3731517 4337037 4471119 4564107 4658299 4705209 4802313 4902189 5053743 5873823 5926527 6308921 6562323 7048421 7627203 8026533 8192181 8621091 10020051 10762277 11094999 11194551 13011111 13413357 13692321 13974897 14406939 14706567 15161229 16284283 17621469 18926763 19686969 21145263 22881609 24576543 25863273 27779071 30060153 32286831 33284997 33583653 39033333 41924691 43220817 44119701 45483687 46422359 48852849 52864407 56780289 59060907 63435789 73729629 77589819 79191083 83337213 90180459 96860493 99854991 100750959 107251657 125774073 129662451 132359103 136451061 139267077 146558547 170340867 182958709 190307367 221188887 232769457 237573249 250011639 290581479 299564973 312106033 321754971 377322219 388987353 397077309 417801231 439675641 472244207 511022601 548876127 570922101 663566661 712719747 750034917 871744437 898694919 936318099 965264913 1131966657 1253403693 1319026923 1346248411 1416732621 1533067803 1646628381 1712766303 2138159241 2250104751 2615233311 2808954297 2895794739 3110298053 3760211079 3957080769 4038745233 4250197863 4939885143 5305802561 6414477723 6750314253 8426862891 8687384217 9330894159 11280633237 12116235699 12750593589 14819655429 15917407683 19243433169 25280588673 26062152651 27992682477 36348707097 38251780767 44458966287 47752223049 75841766019 83978047431 90198643537 109046121291 114755342301 143256669147 251934142293 270595930611 327138363873 429770007441 755802426879 811787791833 1289310022323 2435363375499 7306090126497 21918270379491
• Sum of all divisors σ(n): 36853882490880
• Sum of proper divisors (its aliquot sum) s(n): 14935612111389
• 21918270379491 is a deficient number, because the sum of its proper divisors (14935612111389) is less than itself. Its deficiency is 6982658268102

Bases of 21918270379491

• Binary: 100111110111100111110101110000101010111100011₂
• Hexadecimal: 0x13EF3EB855E3
• Base-36: 7RP449R6R

Squares and roots of 21918270379491

• 21918270379491 squared (21918270379491²) is 480410576428472545153419081
• 21918270379491 cubed (21918270379491³) is 10529768907326386991677305473326030467771
• The square root of 21918270379491 is 4681695.2463280863
• The cube root of 21918270379491 is 27985.6518237037

Scales and comparisons

• 21,918,270,379,491 seconds is equal to 696,933 years, 10 weeks, 2 days, 22 hours, 44 minutes, 51 seconds.
• To count from 1 to 21,918,270,379,491 would take you about one million, seven hundred forty-two thousand, three hundred thirty-three 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 21918270379491 cubic inches would be around 2332.1 feet tall.

Recreational maths with 21918270379491

• 21918270379491 backwards is 19497307281912
• The number of decimal digits it has is: 14
• The sum of 21918270379491's digits is 63
• More coming soon!