21661342794

Names of 21661342794

• Cardinal: 21661342794 can be written as Twenty-one billion, six hundred sixty-one million, three hundred forty-two thousand, seven hundred ninety-four.

Scientific notation

• Scientific notation: 2.1661342794 × 10¹⁰

Factors of 21661342794

• Number of distinct prime factors ω(n): 7
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 686

Divisors of 21661342794

• Number of divisors d(n): 288
• Complete list of divisors:
  1 2 3 6 7 9 13 14 18 21 26 39 41 42 43 63 78 82 86 91 117 123 126 129 169 182 234 246 258 273 287 301 338 369 387 507 533 546 559 574 577 602 738 774 819 861 903 1014 1066 1118 1154 1183 1521 1599 1638 1677 1722 1731 1763 1806 2366 2583 2709 3042 3198 3354 3462 3526 3549 3731 3913 4039 4797 5031 5166 5193 5289 5418 6929 7098 7267 7462 7501 7826 8078 9594 10062 10386 10578 10647 11193 11739 12117 12341 13858 14534 15002 15867 20787 21294 21801 22386 22503 22919 23478 23657 24234 24682 24811 31734 33579 35217 36351 37023 41574 43602 45006 45838 47314 48503 49622 50869 52507 62361 65403 67158 67509 68757 70434 70971 72702 74046 74433 97006 97513 101738 105014 111069 124722 130806 135018 137514 141942 145509 148866 152607 157521 160433 165599 173677 195026 206271 212913 222138 223299 291018 292539 297947 305214 307541 315042 320866 322543 331198 347354 412542 425826 436527 446598 457821 472563 481299 496797 521031 585078 595894 615082 645086 682591 873054 877617 893841 915642 922623 945126 962598 967629 993594 1017251 1042062 1365182 1443897 1490391 1563093 1755234 1787682 1845246 1935258 2034502 2047773 2085629 2152787 2257801 2681523 2767869 2887794 2902887 2980782 3051753 3126186 3998033 4095546 4171258 4193059 4305574 4515602 5363046 5535738 5805774 6103506 6143319 6256887 6458361 6773403 7120757 7996066 8386118 9155259 11994099 12286638 12513774 12579177 12916722 13224263 13546806 14241514 18310518 18770661 19375083 20320209 21362271 23988198 25158354 26448526 27986231 29351413 35982297 37541322 37737531 38750166 39672789 40640418 42724542 55972462 58702826 64086813 71964594 75475062 79345578 83958693 88054239 92569841 119018367 128173626 167917386 171915419 176108478 185139682 238036734 251876079 264162717 277709523 343830838 503752158 515746257 528325434 555419046 833128569 1031492514 1203407933 1547238771 1666257138 2406815866 3094477542 3610223799 7220447598 10830671397 21661342794
• Sum of all divisors σ(n): 60986749824
• Sum of proper divisors (its aliquot sum) s(n): 39325407030
• 21661342794 is an abundant number, because the sum of its proper divisors (39325407030) is greater than itself. Its abundance is 17664064236

Bases of 21661342794

• Binary: 10100001011000111011101110001001010₂
• Hexadecimal: 0x50B1DDC4A
• Base-36: 9Y8LR2I

Squares and roots of 21661342794

• 21661342794 squared (21661342794²) is 469213771639175726436
• 21661342794 cubed (21661342794³) is 10163800351141820689934163902184
• The square root of 21661342794 is 147177.9290314957
• The cube root of 21661342794 is 2787.5871790093

Scales and comparisons

• 21,661,342,794 seconds is equal to 688 years, 39 weeks, 4 days, 23 hours, 39 minutes, 54 seconds.
• To count from 1 to 21,661,342,794 would take you about one thousand, three hundred seventy-seven 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 21661342794 cubic inches would be around 232.3 feet tall.

Recreational maths with 21661342794

• 21661342794 backwards is 49724316612
• The number of decimal digits it has is: 11
• The sum of 21661342794's digits is 45
• More coming soon!