What does 1 Kings 18:19 mean?

Now, gather all Israel to meet me on Mount Carmel, along with the 450 prophets of Baal and the 400 prophets of Asherah who eat at Jezebel's table. 1 Kings 18:19 - Modern Text Bible

(Elijah calls for a showdown: all Israel, plus the prophets of Baal and Asherah, are to meet him at Mount Carmel.)