Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
### Context:
CREATE TABLE table_24913533_4 (rebounds VARCHAR, points VARCHAR)
### Question:
How many numbers of rebounds are associated with exactly 18 points?
### Answer:
SELECT COUNT(rebounds) FROM table_24913533_4 WHERE points = 18