From the block reward source that ocminer posted this is the total (there may be more but the source posted only goes to block 8640)

Blocks          Reward      Coins
0 - 119          0               0
120 - 719      1000           600,000
720 - 1439     500            360,000
1440 - 2159   1500           1,080,000
2160 - 2879   500            360,000
2880 - 3599   10000         7,200,000
3600 - 4319   500            360,000
4320 - 5039   2000           1,440,000
5040 - 5759   500            360,000
5760 - 6479   2500           1,800,000
6480 - 7199   500            360,000
7200 - 7919   3000           2,160,000
7920 - 8639   500            360,000

So the total coins up to block 8639 is 16,440,000

Assuming that I have worked that out correctly!