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_17562 ( "Stage" text, "Winner" text, "General classification" text, "Points classification" text, "Mountains classification" text, "Young rider classification" text, "Intergiro classification" text, "Trofeo Fast Team" text )

### Question ###
How many leaders are there in the intergiro classification in stage 20?

### Accurate SQL ###

SELECT COUNT("Intergiro classification") FROM table_17562 WHERE "Stage" = '20'