Kazakhstan,[d] officially the Republic of Kazakhstan,[e] is a landlocked country primarily in Central Asia, with a small portion of its territory in Eastern Europe.[f] It borders Russia to the north and west, China to the east, Kyrgyzstan to the southeast, Uzbekistan to the south, and Turkmenistan to the southwest, with a coastline along the Caspian Sea. Its capital is Astana, while the largest city and leading cultural and commercial hub is Almaty. Kazakhstan is the world's ninth-largest country by land area and the largest landlocked country. It has a population of 20 million and one of the lowest population densities in the world, at fewer than 6 people per square kilometre (16 people/sq mi).[13] Ethnic Kazakhs constitute a majority, while ethnic Russians form a significant minority. Officially secular, Kazakhstan is a Muslim-majority country with a sizeable Christian community.