How many episodes have 18.73 million viewers?
CREATE TABLE table_27481781_2 (
    no_in_series VARCHAR,
    viewers__millions_ VARCHAR
)
SELECT COUNT(no_in_series) FROM table_27481781_2 WHERE viewers__millions_ = "18.73"
Below are sql tables schemas paired with instruction that describes a task. Using valid SQLite, write a response that appropriately completes the request for the provided tables. ### Instruction: How many episodes have 18.73 million viewers? ### Input: CREATE TABLE table_27481781_2 (
    no_in_series VARCHAR,
    viewers__millions_ VARCHAR
) ### Response: SELECT COUNT(no_in_series) FROM table_27481781_2 WHERE viewers__millions_ = "18.73"