What is the circulating supply of the Aurora token?
20 million tokens.
Initial circulating supply after the IDO was million. After that, the DAO gradually distributed additional 9 million as liquidity pool rewards.
Over time 10 million tokens for early contributors were unlocked and included into the circulating supply as well.
The detailed article about the tokenomics can be found at https://aurora.dev/blog/auroradao-approves-aurora-token.