How many of Johann Sebastian Bach's 20 children lived to adulthood?

I am not a big history buff, but this game question about Johann Sebatian Bach is so packed with information. it is a wonderful read of a man born in 1685 and died in 1750 is an amazing life to have had 2 wives in his life. 1st wife gave him 7 children and his 2nd wife 13 children. Not heard of in our 21st century life but an amazing part of musical history. Thank you

Ahh, Bach...