The short answer is 19,500,000.
But this includes 7,000,000 that is part of a loan fund owned by the Breakout Coin company. These 7,000,000 are loaned with 10% annual interest to companies who will promote adoption of BRK, and should not negatively impact price. We expect these coins to be used internally by businesses, backing reward points, or in the case of our first loanee, gaming chips.
This 7,000,000 is not expected to enter circulation because third party businesses will need to retain tight control over them to make the repayment schedule.
This means the number in circulation will be 12,500,000. The number of BRX potentially awarded in the second sale is 12,500,000 to match this number. There will only ever be 12,500,000 BRX.
Please see http://www.breakoutcoin.com/ for more information.