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The twenty euro note (€20) is the third-lowest value euro banknote and has been used since the introduction of the euro (in its cash form) in 2002. 
The note is used in the 23 countries which have it as their sole currency (with 22 legally adopting it); with a population of about 343 million. In August 2018, there were approximately 3,845,000,000 twenty euro banknotes in circulation around the eurozone. It is the second most widely circulated denomination, accounting for over 17% of the total banknotes. Estimates suggest that the average life of a twenty euro banknote is about two years before it is replaced due to wear.
2002