I was just looking up what that function actually returns. If it's the total that can be spent, then we can say it's the current bitcoin supply, which is different from the total mined.

0xbitcoiner

Perhaps that is the correct answer as to when the 20 millionth bitcoin was mined.

As far as supply goes, it is the case that by block 940048 my node still hadn't seen the supply of bitcoins reach 20 million.

 sums satoshis in every unspent tx output. So, it isn't really returning the total mined, so much as the total bitcoin that can be spent.

bitcoin

bitcoin_beginners

Are there 20 million bitcoins yet?

Scoresby

Perhaps that is the correct answer as to when the 20 millionth bitcoin was mined.

As far as supply goes, it is the case that by block 940048 my node still hadn't seen the supply of bitcoins reach 20 million. 

The command I ran `gettxoutsetinfo` sums satoshis in every unspent tx output. So, it isn't really returning the total mined, so much as the total bitcoin that can be spent.