They say that the number 13 is an unlucky number. This is almost a worldwide belief. You will usually never see a room numbered 13, or any hotels or motels with a 13th floor.
But think about this:
13 original colonies,
13 signers of the Declaration of Independence,
13 stripes on our flag,
13 steps on the Pyramid on the $1 bill,
13 letters in the Latin above it,
13 letters in “E Pluribus Unum,”
13 stars above the Eagle,
13 bars on that shield,
13 leaves on the olive branch,
13 fruits, and if you look closely, 13 arrows.
http://www.aquiziam.com/secrets-dollar.html
1776: 7+6 is 13.
1789 - 1776 = 13!
If you take the Hebrew word, “one,” which is transliterated as, “echad,” (Alef-Chet-Dalet) the Gematria of the word is 13!
Don’t carry dollar bills if you have the phobia!
True in the west, but not in the far east. 4 is the unlucky number there. The Chinese word for "4" has only a minor inflection difference from the Chinese word for "death".
There are 56 signatures on the Declaration of Independence.