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_18600760_20 (ansi_code VARCHAR, latitude VARCHAR)

### Question ###
How many ansi codes are there for longitude 46.415037?

### Accurate SQL ###

SELECT COUNT(ansi_code) FROM table_18600760_20 WHERE latitude = "46.415037"