13

Traits of 13

 * "Unlucky" Number
 * Odd
 * Prime
 * Happy Number

Examples of 13

 * 13 Stripes on U.S. flag
 * Triskaidekaphobia
 * 13th Amendment abolished slavery
 * U.S. Dollar:
 * 13 bars on shield
 * 13 leaves on olive branch
 * 13 arrows
 * 13 stars
 * 13 steps on pyramid
 * 13 letters ANNUIT COEPTIS
 * 13 letters E PLURIBUS UNUM