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Numbers 18,000s

A page of the Numeropedia - the Special Encyclopedia of Numbers

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18,000

[EECS]  18K(W) is one of standard numerical values for resistors (of tolerance class 5%).

 

[Math.]  Sum (in degrees) of all internal angles of a 102-side polygon.

 

18,072

[Math.]  180722 = 326,597,184, one of thirty 9-digit square numbers using each of 9 digits 1-9 once.

 

[Math.]  6,963,472,309,248 = 102003+180723 = 24213+190833 = 133223+166303 = 54363+189483.

 

18,074

[Math.]  Two multiples of number 9037, 9037×2 = 18,074 and 9037×7 = 63,259, use each of 10 digits 0-9 once. 

 

18,225

[Math.]  Three square numbers using the same digits:

1352 = 18225, 1592 = 25281 and 2852 = 81225.

 

18,228.35

[Measure]  The length (18228.347 feet) of a marine league.

1 marine league = 3 nautical miles = 5556 m = 18228.347 ft (feet).

 

18,270

[Math.]  Two multiples of number 9135, 9135×2 = 18,270 and 9135×7 = 63,945, use each of 10 digits 0-9 once.

 

18,279

[Math.]  Two multiples of number 6093, 6093×3 = 18,279 and 6093×5 = 30,465, use each of 10 digits 0-9 once.

 

18,306

[Math.]  Two multiples of number 9153, 9153×2 = 18,306 and 9153×3 = 27,459, use each of 10 digits 0-9 once.

 

18,354

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

 

18,370

[Math.]  Two multiples of number 9185, 9185×2 = 18,370 and 9185×2 = 64,295, use each of 10 digits 0-9 once.

 

18,416

[Math.]  A pair of amicable numbers (17296, 18416).

 

18,459

[Math.]  Each ratio 18459/2637 = 7, using each of 9 digits 1-9 once, shows how to arrange a 9-book set on 2 shelves to mark the book #7.

 

18,476

[Math.]  Two multiples of number 4619, 4619×4 = 18,476 and 4619×5 = 23,095, use each of 10 digits 0-9 once.

 

18,496

[Math.]  Sum of the first 16 cube numbers:

13+23+33+…+143+153+163 = 18,496 = (1+2+3+…+14+15+16)2 = 1362.

 

[Math.]  A Cullen number 18496×218496+1.

 

18nnn

[Zip]  U.S. Postal Zip Codes for Pennsylvania: 15nnn-18nnn and 190nn-196nn.