As per International Monetary Fund (IMF) 2019 estimates, the GDP (nominal) of World is USD 87,265,226 million.
However, as per 2018 estimates by World Bank, the GDP (Nominal) of World is USD 85,804,391 million.

World GDP [PPP]

On the other hand, as per 2019 estimates by International Monetary Fund, the GDP (PPP) of World is USD 141,859,625 Million.