21309330

Names of 21309330

• Cardinal: 21309330 can be written as Twenty-one million, three hundred nine thousand, three hundred thirty.

Scientific notation

• Scientific notation: 2.130933 × 10⁷

Factors of 21309330

• Number of distinct prime factors ω(n): 7
• Total number of prime factors Ω(n): 7
• Sum of prime factors: 208

Divisors of 21309330

• Number of divisors d(n): 128
• Complete list of divisors:
  1 2 3 5 6 7 10 14 15 17 21 30 34 35 42 47 51 70 85 94 102 105 119 127 141 170 210 235 238 254 255 282 329 357 381 470 510 595 635 658 705 714 762 799 889 987 1190 1270 1410 1598 1645 1778 1785 1905 1974 2159 2397 2667 3290 3570 3810 3995 4318 4445 4794 4935 5334 5593 5969 6477 7990 8890 9870 10795 11186 11938 11985 12954 13335 15113 16779 17907 21590 23970 26670 27965 29845 30226 32385 33558 35814 41783 45339 55930 59690 64770 75565 83566 83895 89535 90678 101473 125349 151130 167790 179070 202946 208915 226695 250698 304419 417830 453390 507365 608838 626745 710311 1014730 1253490 1420622 1522095 2130933 3044190 3551555 4261866 7103110 10654665 21309330
• Sum of all divisors σ(n): 63700992
• Sum of proper divisors (its aliquot sum) s(n): 42391662
• 21309330 is an abundant number, because the sum of its proper divisors (42391662) is greater than itself. Its abundance is 21082332

Bases of 21309330

• Binary: 1010001010010011110010010₂
• Hexadecimal: 0x1452792
• Base-36: COQDU

Squares and roots of 21309330

• 21309330 squared (21309330²) is 454087545048900
• 21309330 cubed (21309330³) is 9676301346336876237000
• The square root of 21309330 is 4616.2029851383
• The cube root of 21309330 is 277.2404520673

Scales and comparisons

• 21,309,330 seconds is equal to 35 weeks, 1 day, 15 hours, 15 minutes, 30 seconds.
• To count from 1 to 21,309,330 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 21309330 cubic inches would be around 23.1 feet tall.

Recreational maths with 21309330

• 21309330 backwards is 03390312
• 21309330 is a Harshad number.
• The number of decimal digits it has is: 8
• The sum of 21309330's digits is 21
• More coming soon!