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_18766 ( "Rank" real, "Place" text, "County" text, "Per Capita Income" text, "Median House- hold Income" text, "Population" real, "Number of Households" real )

### Question ###
what's the number of households with per capita income being $16,820

### Accurate SQL ###

SELECT "Number of Households" FROM table_18766 WHERE "Per Capita Income" = '$16,820'