New Delhi: Reliance Industries Limited (RIL) Chairman MukeshAmbani, India's richest person, is world's 13th wealthiest person with a networth of $51.8 billion in the Bloomberg Billionaires Index, a daily ranking ofthe world's wealthiest 500 individuals. The list of Bloomberg Billionaire indexincludes 18 Indians, topped by Ambani and is followed by Azim Premji (Rank 48)with a net worth of  $20.5 billion, ShivNadar (Rank 92) with a net worth of $14.5 billion and Uday Kotak (Rank 96) witha net worth of  $13.8 billion.

Amazon Founder and CEO Jeff Bezos is the world's richestperson with a total net worth of USD 125 billion, according to the BloombergBillionaires Index.

Details about the calculations are provided in the net worthanalysis on each billionaire’s profile page, with figures being updated at theclose of every trading day in New York.

The other riches people in the top 10 list includes Chairmanand Chief Executive of LVMH Moët Hennessy Bernard Arnault with a net worth of$108 billion, Microsoft founder Bill Gates $107 billion, Berkshire Hathaway CEOWarren Buffett $83.9 billion, Facebook CEO Mark Zuckerberg $79.5 billion,Inditex fashion group founder Amancio Ortega $67.2 billion, Oracle co-founderLarry Ellison $61.8 billion, Google co-founder Larry Page $56.6 billion, CEO ofTelmex, América Móvil, and Grupo Carso Carlos Slim $56.4 billion, and heiressof Liliane Bettencourt Francoise Bettencourt Meyers $56.3 billion.