18918639954232209

Names of 18918639954232209

• Cardinal: 18918639954232209 can be written as Eighteen quadrillion, nine hundred eighteen trillion, six hundred thirty-nine billion, nine hundred fifty-four million, two hundred thirty-two thousand, two hundred nine.

Scientific notation

• Scientific notation: 1.8918639954232209 × 10¹⁶

Factors of 18918639954232209

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 18
• Sum of prime factors: 53

Divisors of 18918639954232209

• Number of divisors d(n): 231
• Complete list of divisors:
  1 3 9 19 27 31 57 81 93 171 243 279 361 513 589 729 837 961 1083 1539 1767 2187 2511 2883 3249 4617 5301 6561 7533 8649 9747 11191 13851 15903 18259 19683 22599 25947 29241 29791 33573 41553 47709 54777 59049 67797 77841 87723 89373 100719 124659 143127 164331 203391 233523 263169 268119 302157 346921 373977 429381 492993 566029 610173 700569 789507 804357 906471 923521 1040763 1121931 1288143 1478979 1698087 1830519 2101707 2368521 2413071 2719413 2770563 3122289 3864429 4436937 5094261 6305121 7105563 7239213 8158239 8311689 9366867 10754551 11593287 13310811 15282783 17546899 18915363 21316689 21717639 24474717 24935067 28100601 28629151 32263653 34779861 39932433 45848349 52640697 56746089 65152917 73424151 74805201 84301803 85887453 96790959 119797299 137545047 157922091 195458751 220272453 224415603 252905409 257662359 290372877 333391081 359391897 412635141 473766273 543953869 586376253 660817359 673246809 758716227 772987077 871118631 887503681 1000173243 1078175691 1237905423 1421298819 1631861607 1759128759 2019740427 2276148681 2318961231 2613355893 2662511043 3000519729 3713716269 4263896457 4895584821 6059221281 6828446043 6956883693 7840067679 7987533129 9001559187 10335123511 11141148807 12791689371 14686754463 16862569939 18177663843 20485338129 20870651079 23520203037 23962599387 27004677561 31005370533 33423446421 38375068113 44060263389 50587709817 54532991529 62611953237 70560609111 71887798161 81014032683 93016111599 115125204339 132180790167 151763129451 187835859711 211681827333 215663394483 243042098049 279048334797 320388828841 345375613017 396542370501 455289388353 563507579133 635045481999 646990183449 729126294147 837145004391 961166486523 1036126839051 1189627111503 1365868165059 1690522737399 1940970550347 2187378882441 2511435013173 2883499459569 3568881334509 4097604495177 5822911651041 6562136647323 7534305039519 8650498378707 10706644003527 12292813485531 17468734953123 19686409941969 22602915118557 25951495136121 32119932010581 36878440456593 52406204859369 67808745355671 77854485408363 110635321369779 203426236067013 233563456225089 331905964109337 610278708201039 700690368675267 995717892328011 2102071106025801 6306213318077403 18918639954232209
• Sum of all divisors σ(n): 30948309573475881
• Sum of proper divisors (its aliquot sum) s(n): 12029669619243672
• 18918639954232209 is a deficient number, because the sum of its proper divisors (12029669619243672) is less than itself. Its deficiency is 6888970334988537

Bases of 18918639954232209

• Binary: 1000011001101100110011100011110000110110000001110010001₂
• Hexadecimal: 0x4336671E1B0391
• Base-36: 56A3J7NXW29

Squares and roots of 18918639954232209

• 18918639954232209 squared (18918639954232209²) is 357914937717871279046210693019681
• 18918639954232209 cubed (18918639954232209³) is 6771263840925852229365253801100207413750081105329
• 18918639954232209 is a perfect square number. Its square root is 137545047
• The cube root of 18918639954232209 is 266458.7404805079
• Being both a perfect square and a perfect cube, 18918639954232209 is also a perfect sixth number.

Scales and comparisons

• 18,918,639,954,232,209 seconds is equal to 601,554,231 years, 18 weeks, 1 day, 30 minutes, 9 seconds.
• To count from 1 to 18,918,639,954,232,209 would take you about one billion, eight hundred four million, six hundred sixty-two thousand, six hundred ninety-four 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 18918639954232209 cubic inches would be around 22204.9 feet tall.

Recreational maths with 18918639954232209

• 18918639954232209 backwards is 90223245993681981
• 18918639954232209 is a Harshad number.
• The number of decimal digits it has is: 17
• The sum of 18918639954232209's digits is 81
• More coming soon!