Top 20 Richest Countries in the World 2020 By GDP.

These are the Richest countries in the world according to there GDP Nominal and GDP per capita. This list is based on the IMF's World Economic Outlook Database. The nominal GDP of the top 10 economies adds up to about 66% of the world's economy, while the top 20 economies contribute almost 79%. The remaining 173 countries together constitute less than one-fourth to the world's economy.