21384202720

Names of 21384202720

• Cardinal: 21384202720 can be written as Twenty-one billion, three hundred eighty-four million, two hundred two thousand, seven hundred twenty.

Scientific notation

• Scientific notation: 2.138420272 × 10¹⁰

Factors of 21384202720

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 11
• Sum of prime factors: 91

Divisors of 21384202720

• Number of divisors d(n): 144
• Complete list of divisors:
  1 2 4 5 8 10 16 20 32 40 41 43 80 82 86 160 164 172 205 215 328 344 410 430 656 688 820 860 1312 1376 1640 1681 1720 1763 1849 3280 3362 3440 3526 3698 6560 6724 6880 7052 7396 8405 8815 9245 13448 14104 14792 16810 17630 18490 26896 28208 29584 33620 35260 36980 53792 56416 59168 67240 70520 72283 73960 75809 79507 134480 141040 144566 147920 151618 159014 268960 282080 289132 295840 303236 318028 361415 379045 397535 578264 606472 636056 722830 758090 795070 1156528 1212944 1272112 1445660 1516180 1590140 2313056 2425888 2544224 2891320 3032360 3108169 3180280 3259787 5782640 6064720 6216338 6360560 6519574 11565280 12129440 12432676 12721120 13039148 15540845 16298935 24865352 26078296 31081690 32597870 49730704 52156592 62163380 65195740 99461408 104313184 124326760 130391480 133651267 248653520 260782960 267302534 497307040 521565920 534605068 668256335 1069210136 1336512670 2138420272 2673025340 4276840544 5346050680 10692101360 21384202720
• Sum of all divisors σ(n): 53015331600
• Sum of proper divisors (its aliquot sum) s(n): 31631128880
• 21384202720 is an abundant number, because the sum of its proper divisors (31631128880) is greater than itself. Its abundance is 10246926160

Bases of 21384202720

• Binary: 10011111010100110010000100111100000₂
• Hexadecimal: 0x4FA9909E0
• Base-36: 9TNLOF4

Squares and roots of 21384202720

• 21384202720 squared (21384202720²) is 457284125970055398400
• 21384202720 cubed (21384202720³) is 9778656450381681289015963648000
• The square root of 21384202720 is 146233.3844236671
• The cube root of 21384202720 is 2775.6477764873

Scales and comparisons

• 21,384,202,720 seconds is equal to 679 years, 49 weeks, 3 days, 8 hours, 18 minutes, 40 seconds.
• To count from 1 to 21,384,202,720 would take you about one thousand, three hundred fifty-nine 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 21384202720 cubic inches would be around 231.3 feet tall.

Recreational maths with 21384202720

• 21384202720 backwards is 02720248312
• The number of decimal digits it has is: 11
• The sum of 21384202720's digits is 31
• More coming soon!