The Arab world (Arabic: العالم العربي‎‎ al-ʿālam al-ʿarabī; formally: الوطن العربي al-wațan al-ʿarabī), also known as the Arab nation (الأمة العربية al-ʾummah al-ʿarabīah), consists of the 22 Arabic-speaking countries of the Arab League. These Arab states occupy an area stretching from the Atlantic Ocean in the west to the Arabian Sea in the east, and from the Mediterranean Sea in the north to the Horn of Africa and the Indian Ocean in the southeast. The contemporary Arab world has a combined population of around 422 million people, over half of whom are under 25 years of age.