From the article on numerology at Skeptic’s Dictionary.
When you get your reading, you may find yourself ignoring the parts that don’t fit you at all, and focusing on those parts that do seem to fit. They may actually fit you or they may fit your image of how you would like to be. No matter; if they fit, you may fall for it. You may even be tempted to go one step further and call your own personal psychic on one of the “friends” psychic hotlines. (I think the $9 numerology reading might be cheaper, though.) The testimonials for numerology and the telephone psychics are quite similar. Marriages are saved, jobs are landed, personal problems are resolved and love is found.
…numbers give the quackery an aura of both scientific and mystical authoritativeness, especially if complex statistical analysis is involved.
…Different languages have different alphabets; different cultures use different calendars. It is unreasonable enough to think the universe is arranged according to numerical transcriptions of names, but to think that there are several equivalent transcriptions to accommodate cultural differences stretches the limits of credibility almost to infinity.