20987304640

Names of 20987304640

• Cardinal: 20987304640 can be written as Twenty billion, nine hundred eighty-seven million, three hundred four thousand, six hundred forty.

Scientific notation

• Scientific notation: 2.098730464 × 10¹⁰

Factors of 20987304640

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 11
• Sum of prime factors: 761

Divisors of 20987304640

• Number of divisors d(n): 224
• Complete list of divisors:
  1 2 4 5 8 10 16 20 29 32 40 53 58 64 71 80 106 116 142 145 160 212 232 265 284 290 320 355 424 464 530 568 580 601 710 848 928 1060 1136 1160 1202 1420 1537 1696 1856 2059 2120 2272 2320 2404 2840 3005 3074 3392 3763 4118 4240 4544 4640 4808 5680 6010 6148 7526 7685 8236 8480 9280 9616 10295 11360 12020 12296 15052 15370 16472 16960 17429 18815 19232 20590 22720 24040 24592 30104 30740 31853 32944 34858 37630 38464 41180 42671 48080 49184 60208 61480 63706 65888 69716 75260 82360 85342 87145 96160 98368 109127 120416 122960 127412 131776 139432 150520 159265 164720 170684 174290 192320 213355 218254 240832 245920 254824 278864 301040 318530 329440 341368 348580 426710 436508 491840 509648 545635 557728 602080 637060 658880 682736 697160 853420 873016 923737 1019296 1091270 1115456 1204160 1237459 1274120 1365472 1394320 1706840 1746032 1847474 2038592 2182540 2261563 2474918 2548240 2730944 2788640 3413680 3492064 3694948 4365080 4523126 4618685 4949836 5096480 5577280 6187295 6827360 6984128 7389896 8730160 9046252 9237370 9899672 10192960 11307815 12374590 13654720 14779792 17460320 18092504 18474740 19799344 22615630 24749180 29559584 34920640 36185008 36949480 39598688 45231260 49498360 59119168 65585327 72370016 73898960 79197376 90462520 98996720 131170654 144740032 147797920 180925040 197993440 262341308 295595840 327926635 361850080 395986880 524682616 655853270 723700160 1049365232 1311706540 2098730464 2623413080 4197460928 5246826160 10493652320 20987304640
• Sum of all divisors σ(n): 53505567360
• Sum of proper divisors (its aliquot sum) s(n): 32518262720
• 20987304640 is an abundant number, because the sum of its proper divisors (32518262720) is greater than itself. Its abundance is 11530958080

Bases of 20987304640

• Binary: 10011100010111100001101101011000000₂
• Hexadecimal: 0x4E2F0DAC0
• Base-36: 9N3ARWG

Squares and roots of 20987304640

• 20987304640 squared (20987304640²) is 440466956052165529600
• 20987304640 cubed (20987304640³) is 9244214190520289701422137344000
• The square root of 20987304640 is 144869.9576861953
• The cube root of 20987304640 is 2758.3681034267

Scales and comparisons

• 20,987,304,640 seconds is equal to 667 years, 17 weeks, 1 day, 14 hours, 50 minutes, 40 seconds.
• To count from 1 to 20,987,304,640 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 20987304640 cubic inches would be around 229.9 feet tall.

Recreational maths with 20987304640

• 20987304640 backwards is 04640378902
• The number of decimal digits it has is: 11
• The sum of 20987304640's digits is 43
• More coming soon!