The president of Nauru is Lionel Aingimea, who heads a 19-member unicameral parliament. The country is a member of the United Nations, the Commonwealth of Nations, and the Asian Development Bank. Nauru also participates in the Commonwealth and Olympic Games. Recently Nauru became a member country of the International Renewable Energy Agency (IRENA). The Republic of Nauru became the 189th member of the International Monetary Fund in April 2016.