How is the number thirteen related to Lucifer?

Judas Iscariot was the 13th person at the Last Supper, and he betrayed Jesus Christ, and was thought to be possessed by Satan himself. It might also have to do with the fact that Judas' Satanic decision to betray Christ cost Judas his own sanity, which caused him to commit suicide. The above interpretation is the most traditional regarding Judas, though there is some new insight into his role as an Apostle that believes he did not actually betray Jesus.