The Meaning of Numbers: The Number 13
The number 13 is symbolic of rebellion and lawlessness. Nimrod, the mighty hunter who was 'before the Lord' (meaning he tried to take the place of God - Genesis 10:9), was the 13th in Ham's line (Ham was one of Noah's three sons who survived the flood). Thirteen represents all the governments created by men, and inspired by Satan, in outright rebellion against the Eternal.