21901380

Names of 21901380

• Cardinal: 21901380 can be written as Twenty-one million, nine hundred one thousand, three hundred eighty.

Scientific notation

• Scientific notation: 2.190138 × 10⁷

Factors of 21901380

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 7
• Sum of prime factors: 387

Divisors of 21901380

• Number of divisors d(n): 96
• Complete list of divisors:
  1 2 3 4 5 6 10 12 15 20 29 30 41 58 60 82 87 116 123 145 164 174 205 246 290 307 348 410 435 492 580 614 615 820 870 921 1189 1228 1230 1535 1740 1842 2378 2460 3070 3567 3684 4605 4756 5945 6140 7134 8903 9210 11890 12587 14268 17806 17835 18420 23780 25174 26709 35612 35670 37761 44515 50348 53418 62935 71340 75522 89030 106836 125870 133545 151044 178060 188805 251740 267090 365023 377610 534180 730046 755220 1095069 1460092 1825115 2190138 3650230 4380276 5475345 7300460 10950690 21901380
• Sum of all divisors σ(n): 65197440
• Sum of proper divisors (its aliquot sum) s(n): 43296060
• 21901380 is an abundant number, because the sum of its proper divisors (43296060) is greater than itself. Its abundance is 21394680

Bases of 21901380

• Binary: 1010011100011000001000100₂
• Hexadecimal: 0x14E3044
• Base-36: D1F7O

Squares and roots of 21901380

• 21901380 squared (21901380²) is 479670445904400
• 21901380 cubed (21901380³) is 10505444710521708072000
• The square root of 21901380 is 4679.8910243723
• The cube root of 21901380 is 279.7846132705

Scales and comparisons

• 21,901,380 seconds is equal to 36 weeks, 1 day, 11 hours, 43 minutes.
• To count from 1 to 21,901,380 would take you about two weeks!

  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 21901380 cubic inches would be around 23.3 feet tall.

Recreational maths with 21901380

• 21901380 backwards is 08310912
• The number of decimal digits it has is: 8
• The sum of 21901380's digits is 24
• More coming soon!