How old was Odysseus when he died?

He was 18 when Odysseus married Penelope. He was in his 24 when he left for the Trojan War. It took him 20 years to get back home, and he lived for another 10 years before his youngest son, Telegonus, son of Circe, kills Odysseus without knowing who his father was. So in total, Odysseus was 54 years old.