SELECT MAX(number_of_households) FROM table_name_88 WHERE median_family_income = "$52,106" AND population < 21 OFFSET 403
Berapa jumlah rumah tangga terbesar dengan pendapatan keluarga rata -rata $ 52.106 dengan populasi kurang dari 21.403?
CREATE TABLE table_name_88 (number_of_households INTEGER, median_family_income VARCHAR, population VARCHAR)