21357456640

Names of 21357456640

• Cardinal: 21357456640 can be written as Twenty-one billion, three hundred fifty-seven million, four hundred fifty-six thousand, six hundred forty.

Scientific notation

• Scientific notation: 2.135745664 × 10¹⁰

Factors of 21357456640

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 13
• Sum of prime factors: 531

Divisors of 21357456640

• Number of divisors d(n): 288
• Complete list of divisors:
  1 2 4 5 8 10 13 16 20 26 32 40 52 53 61 64 65 80 104 106 122 128 130 160 208 212 244 256 260 265 305 320 397 416 424 488 520 530 610 640 689 793 794 832 848 976 1040 1060 1220 1280 1378 1586 1588 1664 1696 1952 1985 2080 2120 2440 2756 3172 3176 3233 3328 3392 3445 3904 3965 3970 4160 4240 4880 5161 5512 6344 6352 6466 6784 6890 7808 7930 7940 8320 8480 9760 10322 11024 12688 12704 12932 13568 13780 15616 15860 15880 16165 16640 16960 19520 20644 21041 22048 24217 25376 25408 25805 25864 27560 31720 31760 32330 33920 39040 41288 42029 42082 44096 48434 50752 50816 51610 51728 55120 63440 63520 64660 67840 78080 82576 84058 84164 88192 96868 101504 101632 103220 103456 105205 110240 121085 126880 127040 129320 165152 168116 168328 176384 193736 203008 206440 206912 210145 210410 220480 242170 253760 254080 258640 273533 314821 330304 336232 336656 387472 412880 413824 420290 420820 440960 484340 507520 508160 517280 547066 629642 660608 672464 673312 774944 825760 827648 840580 841640 881920 968680 1015040 1034560 1094132 1259284 1283501 1321216 1344928 1346624 1367665 1549888 1574105 1651520 1681160 1683280 1937360 2069120 2188264 2518568 2567002 2689856 2693248 2735330 3099776 3148210 3303040 3362320 3366560 3874720 4138240 4376528 5037136 5134004 5379712 5386496 5470660 6199552 6296420 6417505 6606080 6724640 6733120 7749440 8753056 10074272 10268008 10759424 10941320 12592840 12835010 13449280 13466240 15498880 16685513 17506112 20148544 20536016 21882640 25185680 25670020 26898560 26932480 30997760 33371026 35012224 40297088 41072032 43765280 50371360 51340040 53797120 66742052 70024448 80594176 82144064 83427565 87530560 100742720 102680080 133484104 164288128 166855130 175061120 201485440 205360160 266968208 328576256 333710260 350122240 402970880 410720320 533936416 667420520 821440640 1067872832 1334841040 1642881280 2135745664 2669682080 4271491328 5339364160 10678728320 21357456640
• Sum of all divisors σ(n): 57196401696
• Sum of proper divisors (its aliquot sum) s(n): 35838945056
• 21357456640 is an abundant number, because the sum of its proper divisors (35838945056) is greater than itself. Its abundance is 14481488416

Bases of 21357456640

• Binary: 10011111001000000001110110100000000₂
• Hexadecimal: 0x4F900ED00
• Base-36: 9T7OF0G

Squares and roots of 21357456640

• 21357456640 squared (21357456640²) is 456140954129480089600
• 21357456640 cubed (21357456640³) is 9742010649548599959375314944000
• The square root of 21357456640 is 146141.9058312845
• The cube root of 21357456640 is 2774.4900890319

Scales and comparisons

• 21,357,456,640 seconds is equal to 679 years, 5 weeks, 1 day, 18 hours, 50 minutes, 40 seconds.
• To count from 1 to 21,357,456,640 would take you about one thousand, three hundred fifty-eight 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 21357456640 cubic inches would be around 231.2 feet tall.

Recreational maths with 21357456640

• 21357456640 backwards is 04665475312
• The number of decimal digits it has is: 11
• The sum of 21357456640's digits is 43
• More coming soon!