21804739997793921

Names of 21804739997793921

• Cardinal: 21804739997793921 can be written as Twenty-one quadrillion, eight hundred four trillion, seven hundred thirty-nine billion, nine hundred ninety-seven million, seven hundred ninety-three thousand, nine hundred twenty-one.

Scientific notation

• Scientific notation: 2.1804739997793921 × 10¹⁶

Factors of 21804739997793921

• Number of distinct prime factors ω(n): 7
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 29843

Divisors of 21804739997793921

• Number of divisors d(n): 288
• Complete list of divisors:
  1 3 7 9 17 21 23 49 51 63 69 119 147 153 161 207 357 391 441 483 833 1071 1127 1173 1449 2161 2311 2499 2737 3381 3519 6483 6933 7497 8211 10143 15127 16177 19159 19449 20799 24633 25321 36737 39287 45381 48531 49703 53153 57477 75963 105889 110211 113239 117861 136143 145593 149109 159459 172431 177247 227889 257159 275009 317667 330633 339717 347921 353583 372071 430457 447327 478377 531741 582383 771477 825027 844951 903601 953001 1019151 1043763 1116213 1240729 1291371 1595223 1747149 1800113 1925063 2314431 2435447 2475081 2534853 2604497 2710803 3013199 3131289 3348639 3722187 3874113 4076681 4994071 5241447 5400339 5775189 5914657 6325207 7306341 7604559 7813491 8132409 9039597 9900511 11166561 12230043 14982213 16201017 17325567 17743971 18975621 21092393 21919023 23440473 27118791 28536767 29701533 34958497 36690129 41402599 44276449 44946639 53231913 54718681 56926863 58516831 63277179 69303577 84899207 85610301 89104599 104875491 114863633 124207797 132829347 164156043 175550493 189831537 207910731 244709479 254697621 256830903 314626473 344590899 372623391 383030767 398488041 409617817 485125039 492468129 526651479 594294449 623732193 734128437 764092863 804045431 930217577 994786127 1033772697 1149092301 1228853451 1258529663 1345887113 1455375117 1782883347 1952681761 2202385311 2412136293 2681215369 2790652731 2867324719 2984358381 3447276903 3686560353 3775588989 4037661339 4160061143 4366125351 5348650041 5628318017 5858045283 6511523039 6963502889 7236408879 8043646107 8371958193 8601974157 8809707641 8953075143 9421209791 11326766967 12112984017 12480183429 13668772327 16884954051 17574135849 19534569117 20890508667 21395004271 22880080921 24130938321 25805922471 26429122923 28263629373 37440550287 41006316981 45580661273 48744520223 50654862153 58603707351 61667953487 62671526001 64185012813 65948468537 68640242763 79287368769 84790888119 95681406289 123018950943 126454871791 136741983819 146233560669 149765029897 160160566447 185003860461 192555038439 197845405611 205920728289 287044218867 379364615373 410225951457 438700682007 449295089691 480481699341 555011581383 593536216833 861132656601 885184102537 1048355209279 1121123965129 1138093846119 1347885269073 1441445098023 2149732820447 2655552307611 2908462051193 3145065627837 3363371895387 6196288717759 6449198461341 7966656922833 8725386153579 9435196883511 10090115686161 15048129743129 18588866153277 19347595384023 20359234358351 26176158460737 45144389229387 49443854870281 55766598459831 61077703075053 105336908201903 135433167688161 142514640508457 148331564610843 183233109225159 316010724605709 346106984091967 427543921525371 444994693832529 948032173817127 1038320952275901 1282631764576113 2422748888643769 3114962856827703 7268246665931307 21804739997793921
• Sum of all divisors σ(n): 40517578164450816
• Sum of proper divisors (its aliquot sum) s(n): 18712838166656895
• 21804739997793921 is a deficient number, because the sum of its proper divisors (18712838166656895) is less than itself. Its deficiency is 3091901831137026

Bases of 21804739997793921

• Binary: 1001101011101110100101110100101111111001111111010000001₂
• Hexadecimal: 0x4D774BA5FCFE81
• Base-36: 5YP4V9OZE69

Squares and roots of 21804739997793921

• 21804739997793921 squared (21804739997793921²) is 475446686371394041975946784554241
• 21804739997793921 cubed (21804739997793921³) is 10366991379140917572411087294312986195817364568961
• The square root of 21804739997793921 is 147664281.3878627895
• The cube root of 21804739997793921 is 279372.4892786397

Scales and comparisons

• 21,804,739,997,793,921 seconds is equal to 693,323,285 years, 22 weeks, 6 days, 9 hours, 25 minutes, 21 seconds.
• To count from 1 to 21,804,739,997,793,921 would take you about two billion, seventy-nine million, nine hundred sixty-nine thousand, eight hundred fifty-six 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 21804739997793921 cubic inches would be around 23281 feet tall.

Recreational maths with 21804739997793921

• 21804739997793921 backwards is 12939779993740812
• The number of decimal digits it has is: 17
• The sum of 21804739997793921's digits is 90
• More coming soon!