Mumbai is the centre of the Mumbai Metropolitan Region, the sixth-most populous metropolitan area in the world with a population of over 23 million (2.3 crore).[19] Mumbai lies on the Konkan coast on the west coast of India and has a deep natural harbour. In 2008, Mumbai was named an alpha world city.[20][21] Mumbai has the highest number of billionaires out of any city in Asia
The name Mumbai (Marathi: मुंबई) originated from Mumbā or Mahā-Ambā-the name of the patron Hindu goddess (kuladevata) Mumbadevi of the native Koli community[38]-and from ā'ī, meaning "mother" in the Marathi language, which is the mother tongue of the Koli people and the official language of Maharashtra.[23][39] According to certain accounts, the Koli community, which hails from Kathiawar and Central Gujarat, is believed to have introduced their deity Mumba from Kathiawar (Gujarat), where her worship continues to this day.[24][25] However, other sources disagree that Mumbai's name was derived from the goddess Mumba