21949980

Names of 21949980

• Cardinal: 21949980 can be written as Twenty-one million, nine hundred forty-nine thousand, nine hundred eighty.

Scientific notation

• Scientific notation: 2.194998 × 10⁷

Factors of 21949980

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 7
• Sum of prime factors: 393

Divisors of 21949980

• Number of divisors d(n): 96
• Complete list of divisors:
  1 2 3 4 5 6 10 12 13 15 20 26 30 39 52 60 65 78 107 130 156 195 214 260 263 321 390 428 526 535 642 780 789 1052 1070 1284 1315 1391 1578 1605 2140 2630 2782 3156 3210 3419 3945 4173 5260 5564 6420 6838 6955 7890 8346 10257 13676 13910 15780 16692 17095 20514 20865 27820 28141 34190 41028 41730 51285 56282 68380 83460 84423 102570 112564 140705 168846 205140 281410 337692 365833 422115 562820 731666 844230 1097499 1463332 1688460 1829165 2194998 3658330 4389996 5487495 7316660 10974990 21949980
• Sum of all divisors σ(n): 67060224
• Sum of proper divisors (its aliquot sum) s(n): 45110244
• 21949980 is an abundant number, because the sum of its proper divisors (45110244) is greater than itself. Its abundance is 23160264

Bases of 21949980

• Binary: 1010011101110111000011100₂
• Hexadecimal: 0x14EEE1C
• Base-36: D2GPO

Squares and roots of 21949980

• 21949980 squared (21949980²) is 481801622000400
• 21949980 cubed (21949980³) is 10575535966876339992000
• The square root of 21949980 is 4685.0805756145
• The cube root of 21949980 is 279.9914113011

Scales and comparisons

• 21,949,980 seconds is equal to 36 weeks, 2 days, 1 hour, 13 minutes.
• To count from 1 to 21,949,980 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 21949980 cubic inches would be around 23.3 feet tall.

Recreational maths with 21949980

• 21949980 backwards is 08994912
• The number of decimal digits it has is: 8
• The sum of 21949980's digits is 42
• More coming soon!