They mean a number in the decimal system.
Some of them can even be looked up in the ASCII chart, since they relate to a character, or a whole text.
The number in the honking: 666 - the number of the beast
Benders appartment number is a 36 in Decimal, or the $ sign
Here you have one of the many decoding pages for binary to text on the web.
Just paste the code you want to know into there, and look if it is a encoded text.
Also go to the Re-/checked Weird Scenes Forums and search for "binary" over there, since all findings have been posted.