21281432172

Names of 21281432172

• Cardinal: 21281432172 can be written as Twenty-one billion, two hundred eighty-one million, four hundred thirty-two thousand, one hundred seventy-two.

Scientific notation

• Scientific notation: 2.1281432172 × 10¹⁰

Factors of 21281432172

• Number of distinct prime factors ω(n): 8
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 987

Divisors of 21281432172

• Number of divisors d(n): 384
• Complete list of divisors:
  1 2 3 4 6 7 11 12 13 14 21 22 26 28 31 33 39 42 44 52 62 66 67 77 78 84 91 93 124 132 134 143 154 156 182 186 201 217 231 268 273 286 308 341 364 372 402 403 429 434 462 469 546 572 651 682 737 804 806 853 858 868 871 924 938 1001 1023 1092 1209 1302 1364 1407 1474 1612 1706 1716 1742 1876 2002 2046 2077 2211 2387 2418 2559 2604 2613 2814 2821 2948 3003 3412 3484 4004 4092 4154 4422 4433 4774 4836 5118 5159 5226 5628 5642 5971 6006 6097 6231 7161 8308 8463 8844 8866 9383 9548 9581 10236 10318 10452 11089 11284 11942 12012 12194 12462 13299 14322 14539 15477 16926 17732 17913 18291 18766 19162 20636 22178 22847 23884 24388 24924 26443 26598 27001 28149 28644 28743 29078 30954 31031 33267 33852 35826 36582 37532 38324 43617 44356 45694 52886 53196 54002 56298 57151 57486 58156 61908 62062 65681 66534 67067 68541 71652 73164 77623 79329 81003 87234 91388 93093 105772 108004 112596 114302 114972 121979 124124 131362 133068 134134 137082 155246 158658 159929 162006 171453 174468 185101 186186 189007 197043 201201 228604 232869 243958 262724 268268 274164 290873 297011 310492 317316 319858 324012 342906 343759 365937 370202 372372 378014 394086 400057 402402 465738 479787 487916 555303 567021 581746 594022 628661 639716 685812 687518 731874 740404 742963 756028 788172 800114 804804 853853 872619 891033 931476 959574 1031277 1110606 1134042 1163492 1188044 1200171 1257322 1375036 1463748 1485926 1600228 1707706 1745238 1771681 1782066 1885983 1919148 2036111 2062554 2079077 2221212 2228889 2268084 2400342 2406313 2514644 2561559 2971852 3415412 3490476 3543362 3564132 3771966 3781349 4072222 4125108 4158154 4400627 4457778 4800684 4812626 5123118 5200741 5315043 6108333 6237231 7086724 7218939 7543932 7562698 8144444 8172593 8316308 8801254 8915556 9625252 10246236 10401482 10630086 11344047 12216666 12401767 12474462 13201881 14437878 15125396 15602223 16345186 17602508 19488491 20802964 21260172 22688094 23031853 24433332 24517779 24803534 24948924 26403762 26469443 28875756 31204446 32690372 37205301 38976982 45376188 46063706 49035558 49607068 52807524 52938886 57208151 58465473 62408892 69095559 74410602 77953964 79408329 92127412 98071116 105877772 114416302 116930946 136419437 138191118 148821204 158816658 161222971 171624453 228832604 233861892 253350383 272838874 276382236 317633316 322445942 343248906 409258311 483668913 506700766 545677748 644891884 686497812 760051149 818516622 967337826 1013401532 1520102298 1637033244 1773452681 1934675652 3040204596 3546905362 5320358043 7093810724 10640716086 21281432172
• Sum of all divisors σ(n): 69931696128
• Sum of proper divisors (its aliquot sum) s(n): 48650263956
• 21281432172 is an abundant number, because the sum of its proper divisors (48650263956) is greater than itself. Its abundance is 27368831784

Bases of 21281432172

• Binary: 10011110100011110001110001001101100₂
• Hexadecimal: 0x4F478E26C
• Base-36: 9RYEY5O

Squares and roots of 21281432172

• 21281432172 squared (21281432172²) is 452899355291436637584
• 21281432172 cubed (21281432172³) is 9638346910377238095179641952448
• The square root of 21281432172 is 145881.5689934819
• The cube root of 21281432172 is 2771.1941300195

Scales and comparisons

• 21,281,432,172 seconds is equal to 676 years, 35 weeks, 3 days, 20 hours, 56 minutes, 12 seconds.
• To count from 1 to 21,281,432,172 would take you about one thousand, three hundred fifty-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 21281432172 cubic inches would be around 230.9 feet tall.

Recreational maths with 21281432172

• 21281432172 backwards is 27123418212
• 21281432172 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 21281432172's digits is 33
• More coming soon!