In Numbers^x, Hyphenation^x, Punctuation^x

Orthography/punctuation experts, Do you hyphenate ordinal numbers such as twenty-third, or fifty-sixth, or not? Thank you in advance.

Sorry to be so long, but I have been looking for a good comprehensive internet source on dashes; all the information seems to be in bits and pieces, and some of it is quite contradictory. Here is a good excerpt, however, from the Get it Write website: 'A number of you have written to ask us...