20987987280

Names of 20987987280

• Cardinal: 20987987280 can be written as Twenty billion, nine hundred eighty-seven million, nine hundred eighty-seven thousand, two hundred eighty.

Scientific notation

• Scientific notation: 2.098798728 × 10¹⁰

Factors of 20987987280

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 126999

Divisors of 20987987280

• Number of divisors d(n): 160
• Complete list of divisors:
  1 2 3 4 5 6 8 10 12 13 15 16 20 24 26 30 39 40 48 52 53 60 65 78 80 104 106 120 130 156 159 195 208 212 240 260 265 312 318 390 424 520 530 624 636 689 780 795 848 1040 1060 1272 1378 1560 1590 2067 2120 2544 2756 3120 3180 3445 4134 4240 5512 6360 6890 8268 10335 11024 12720 13780 16536 20670 27560 33072 41340 55120 82680 126923 165360 253846 380769 507692 634615 761538 1015384 1269230 1523076 1649999 1903845 2030768 2538460 3046152 3299998 3807690 4949997 5076920 6092304 6599996 6726919 7615380 8249995 9899994 10153840 13199992 13453838 15230760 16499990 19799988 20180757 24749985 26399984 26907676 30461520 32999980 33634595 39599976 40361514 49499970 53815352 65999960 67269190 79199952 80723028 87449947 98999940 100903785 107630704 131999920 134538380 161446056 174899894 197999880 201807570 262349841 269076760 322892112 349799788 395999760 403615140 437249735 524699682 538153520 699599576 807230280 874499470 1049399364 1311749205 1399199152 1614460560 1748998940 2098798728 2623498410 3497997880 4197597456 5246996820 6995995760 10493993640 20987987280
• Sum of all divisors σ(n): 71390180736
• Sum of proper divisors (its aliquot sum) s(n): 50402193456
• 20987987280 is an abundant number, because the sum of its proper divisors (50402193456) is greater than itself. Its abundance is 29414206176

Bases of 20987987280

• Binary: 10011100010111110110100010101010000₂
• Hexadecimal: 0x4E2FB4550
• Base-36: 9N3PEMO

Squares and roots of 20987987280

• 20987987280 squared (20987987280²) is 440495610065441798400
• 20987987280 cubed (20987987280³) is 9245116260949332432399524352000
• The square root of 20987987280 is 144872.3137110745
• The cube root of 20987987280 is 2758.3980096331

Scales and comparisons

• 20,987,987,280 seconds is equal to 667 years, 18 weeks, 2 days, 12 hours, 28 minutes.
• To count from 1 to 20,987,987,280 would take you about one thousand, three hundred thirty-four 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 20987987280 cubic inches would be around 229.9 feet tall.

Recreational maths with 20987987280

• 20987987280 backwards is 08278978902
• 20987987280 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 20987987280's digits is 60
• More coming soon!