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_20415 ( "Episode Number" real, "Air Date" text, "Guest Host" text, "Musical Guest (Song performed)" text, "Who knows the most about the guest host? panelists" text )

### Question ###
Name the number of panelists for 20 january 2006 air date

### Accurate SQL ###

SELECT COUNT("Who knows the most about the guest host? panelists") FROM table_20415 WHERE "Air Date" = '20 January 2006'