21668472

Names of 21668472

• Cardinal: 21668472 can be written as Twenty-one million, six hundred sixty-eight thousand, four hundred seventy-two.

Scientific notation

• Scientific notation: 2.1668472 × 10⁷

Factors of 21668472

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 10
• Sum of prime factors: 310

Divisors of 21668472

• Number of divisors d(n): 160
• Complete list of divisors:
  1 2 3 4 6 7 8 9 12 14 17 18 21 24 27 28 34 36 42 51 54 56 63 68 72 81 84 102 108 119 126 136 153 162 168 189 204 216 238 252 281 306 324 357 378 408 459 476 504 562 567 612 648 714 756 843 918 952 1071 1124 1134 1224 1377 1428 1512 1686 1836 1967 2142 2248 2268 2529 2754 2856 3213 3372 3672 3934 4284 4536 4777 5058 5508 5901 6426 6744 7587 7868 8568 9554 9639 10116 11016 11802 12852 14331 15174 15736 17703 19108 19278 20232 22761 23604 25704 28662 30348 33439 35406 38216 38556 42993 45522 47208 53109 57324 60696 66878 70812 77112 85986 91044 100317 106218 114648 128979 133756 141624 159327 171972 182088 200634 212436 257958 267512 300951 318654 343944 386937 401268 424872 515916 601902 637308 773874 802536 902853 1031832 1203804 1274616 1547748 1805706 2407608 2708559 3095496 3611412 5417118 7222824 10834236 21668472
• Sum of all divisors σ(n): 73703520
• Sum of proper divisors (its aliquot sum) s(n): 52035048
• 21668472 is an abundant number, because the sum of its proper divisors (52035048) is greater than itself. Its abundance is 30366576

Bases of 21668472

• Binary: 1010010101010001001111000₂
• Hexadecimal: 0x14AA278
• Base-36: CWFI0

Squares and roots of 21668472

• 21668472 squared (21668472²) is 469522678814784
• 21668472 cubed (21668472³) is 10173839019263140290048
• The square root of 21668472 is 4654.9406011247
• The cube root of 21668472 is 278.7892963429

Scales and comparisons

• 21,668,472 seconds is equal to 35 weeks, 5 days, 19 hours, 1 minute, 12 seconds.
• To count from 1 to 21,668,472 would take you about five days!

  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 21668472 cubic inches would be around 23.2 feet tall.

Recreational maths with 21668472

• 21668472 backwards is 27486612
• 21668472 is a Harshad number.
• The number of decimal digits it has is: 8
• The sum of 21668472's digits is 36
• More coming soon!