Numbers 20,000s

A page of the Numeropedia - the Special Encyclopedia of Numbers

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20,000

[EECS]  FPGA (Field-Programmable Gate Array) refers to building of logic blocks of integrated circuits, usually consisting of more than 20,000 logic gates.

 

[EECS]  20K(W) is one of standard numerical values for resistors (of tolerance class 5%).

 

[Literature]  A famous novel “20,000 Leagues Under the Sea”, by author Jules Verne.

 

[Science]  The maximum sound frequency (approximately, in Hz, Hertz) that a normal human ear can hear. Normal hearing frequency range is 20-20,000 Hz, most sensitive in the range: 1000-4000 Hz.

 

20,002

[Math.]  (Sequence of numbers 20…02).

 200023 = 8002400240008 = (–8+0024002–4000+8)3 

 

20,006

[Zip]  U.S. Postal Zip Code of the White House: Washington, DC 20500. It really locates in ZIP Code 20006.

 

20,089

[Math.]  A prime number.  200892 = 403,567,921, a square using all 9 digits 0-9 once, except digit 8.

 

20,169

[Math.]  Two multiples of number 6723, 6723×3 = 20,169 and 6723×8 = 53,784, use each of 10 digits 0-9 once.

 

20,316

[Math.]  203162 = 412,739,856, one of thirty 9-digit square numbers using each of 9 digits 1-9 once.

 

20,449

[Math.]  20,449 = 1432 = 72+82+…+392.

 

20,457

[Math.]  The equality 6819×3 = 20,457 uses each of 10 digits 0-9 once.

 

20,500

[Zip]  U.S. Postal Zip Code of the White House: Washington, DC 20500. It really locates in Zip Code 20006.

 

20,510

[Zip]  U.S. Postal Zip Code of the U.S. Senate: Washington, DC 20510.

 

20,513

[Math.]  205132 = 420,783,169, a square using all 9 digits 0-9 once, except digit 5.

 

20,515

[Zip]  U.S. Postal Zip Code of the U.S. House of Representatives: Washington, DC 20515.

 

20,547

[Math.]  Two multiples of number 6849, 6849×2 = 13,698 and 6849×3 = 20,547, use each of 10 digits 0-9 once. 

 

20,683

[Math.]  A number that is the sum of 2 cube numbers in 2 ways: 20683 = 273+103 = 243+193.

 

20,736

[Math.]  20,736 = 64×42×20.

 

20,754

[Math.]  207542 = 430,728,516, one of 22 squares using all 9 digits 0-8 once.

 

[Math.] The equality 6918×3 = 20,754 uses each of 10 digits 0-9 once.

 

20,769

[Math.]  Two multiples of number 2967, 2967×5 = 14,835 and 2967×7 = 20,769, use each of 10 digits 0-9 once.

 

20,790

[Math.]  Two consecutive sums of consecutive numbers:

729+730+…+756 = 757+758+…+783 = 20,790.

 

20,817

[Math.]  Two multiples of number 6939, 6939×3 = 20,817 and 6939×5 = 34,695, use each of 10 digits 0-9 once.

 

20,871

[Calendar]  The number of full weeks in a 400-year period in a currently-used Gregorian year, after the adoption of the Gregorian calendar, created by Pope Gregory XIII in 1582 to reform the old Julian calendar.

 

[Math.]   20871 = 773×33.

 

20,976

[Math.]  Two multiples of number 2622, 2622×7 = 18,354 and 2622×8 = 20,976, use each of 10 digits 0-9 once.

 

20nnn

[Zip]  U.S. Postal Zip Codes of Washington D.C: 200nn, 202nn-205nn and 569nn, Maryland: 21nnn and 206nn-209nn, Virginia: 22nnn-23nnn, 240nn-246nn and 201nn.

 

2nnnn

[Zip]  U.S. Postal Zip Codes of Washington D.C: 200nn, 202nn-205nn and 569nn, Maryland: 21nnn and 206nn-209nn, Virginia: 22nnn-23nnn, 240nn-246nn and 201nn, West Virginia: 247nn-249nn and 25nnn-26nnn, North Carolina: 27nnn and 28nnn and South Carolina: 29nnn.