More meetings are on the anvil during the remaining days in Australia and Fiji, where he will be making a day-long visit.
It was a warm hug for Australian Premier Tony Abbott by Modi -- described by the Australian media as a "standout shake" so far at the G20 summit -- that was distinct from the formal handshakes with the host by other world leaders.
"The life of Walter Burley Griffin is a common link among USA-Australia-India which the leaders appreciated," External Affairs Ministry Spokesperson Syed Akbaruddin tweeted.
Obama and Russian President Vladimir Putin were also seen having a chat with Modi at the summit of the Group of 20 industrialised and major emerging economies.
"Focus on global issues," External Affairs Ministry Spokesperson Syed Akbaruddin tweeted about this interaction.
The Spokesperson, while giving details of these meetings, said Modi had informal interactions with several world leaders, including Abbott, Obama and Prince Saud, during the course of the summit.
The informal meeting of the five-nation BRICS also saw Modi having interactions with Chinese President Xi Jinping, Brazilian President Dilma Rousseff, Putin and South African President Jacob Zuma.
Modi is due to meet German Chancellor Angela Merkel and Spain's Premier Mariano Rajoy tomorrow.
