Saudi Arabia ( / (listen), -/ (listen); Arabic: as-Saʿūdīyah), officially the Kingdom of Saudi Arabia (KSA; Arabic: al-Mamlakah ʿArabīyah as-Saʿūdīyah, pronunciation (·)), is a country in Western Asia constituting the bulk of the Arabian Peninsula. With a land area of approximately 2,150,000 km (830,000 sq mi), Saudi Arabia is the largest sovereign state in the Middle East, geographically the fifth-largest in Asia, second-largest in the Arab world after Algeria and 12th-largest in the world. Saudi Arabia is bordered by Jordan and Iraq to the north, Kuwait to the northeast, Qatar, Bahrain, and the United Arab Emirates to the east, Oman to the southeast and Yemen to the south. It is separated from Israel and Egypt by the Gulf of Aqaba. It is the only nation with both a Red Sea coast and a Persian Gulf coast, and most of its terrain consists of arid desert, lowland and mountains. Saudi Arabia is the largest economy in the Middle East as of October 2018 and the 18th largest in the world.