Table schema:
CREATE TABLE table_name_88 (number_of_households INTEGER, median_family_income VARCHAR, population VARCHAR)

Question: What is the largest number of households with median family income of $52,106 with less than 21,403 in population?
SQL: SELECT MAX(number_of_households) FROM table_name_88 WHERE median_family_income = "$52,106" AND population < 21 OFFSET 403