Ghana, officially called the Republic of Ghana, is a sovereign state and unitary presidential constitutional republic, located along the Gulf of Guinea and Atlantic Ocean, in West Africa. The country is bordered by the Ivory Coast in the west, Burkina Faso in the north, Togo in the east and the Gulf of Guinea and Atlantic Ocean in the south. Ghana has a land mass of 238,535 square kilometers, with 2,093 kilometres of international land borders. It is a democratic constitutional republic divided into ten administrative regions, with a multiethnic population of around 24 million as of 2010. One of the most stable and developed countries in Africa, Ghana's economy is among the largest in the continent and one of the fastest growing in the world. It is a significant petroleum and natural gas producer, one of the world's largest gold and diamond producers, and the second largest producer of cocoa in the world. Ghana is home to Lake Volta, the largest artificial lake in the world by surface area. Ghana is a regional power in West Africa, a founding member of the Non-Aligned Movement, and a member of both the Economic Community of West African States (ECOWAS) and the Group of 24 (G24).