Why is 13 superstitious?

The number 13 is often considered superstitious due to various cultural beliefs and historical associations. In Western cultures, it is frequently linked to bad luck, partly stemming from the Last Supper, where Judas Iscariot, the betrayer of Jesus, was the 13th guest. Additionally, the fear of the number 13, known as triskaidekaphobia, has led to the avoidance of the number in buildings, hotels, and even airlines. This negative perception has persisted through folklore and societal customs, reinforcing its reputation as an unlucky number.