CREATE TABLE table_20432 ("Episode Number" FLOAT, "Air Date" TEXT, "Guest Host" TEXT, "Musical Guest  ( Song performed ) " TEXT, "Who knows the most about the guest host? panelists" TEXT, "Coat Of Cash Wearing Celebrity" TEXT)

Name the total number of panelists for 19 january 2007
SELECT COUNT("Who knows the most about the guest host? panelists") FROM table_20432 WHERE "Air Date" = '19 January 2007'
SELECT COUNT("Who knows the most about the guest host? panelists") FROM "table_20432" WHERE "Air Date" = '19 January 2007'