'Twenty' in the Bible

A man came from Baal-Shalishah and brought food to the man of God: firstfruits and twenty loaves of barley bread, with ripe grain in his sack. He said, "Give [it] to the people and let them eat."

In the fifty-second year of Azariah king of Judah, Pekah the son of Remaliah began to reign over Israel in Samaria [for] twenty years.

Ahaz was twenty years old when he began to reign, and he reigned sixteen years in Jerusalem. He did not do right in the eyes of Yahweh his God as David his ancestor.