Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_17650725_1 (transfers_out INTEGER, total_transfers VARCHAR)

### Question ###
Name the least transfers out when transfers is 21

### Accurate SQL ###

SELECT MIN(transfers_out) FROM table_17650725_1 WHERE total_transfers = 21