Amount , Number
Amount is used to refer to a quantity of something uncountable. Number is used to refer to things or people that can be counted. The expression "a number of..." is followed by the verb in plural.
She inherited a considerable amount of money.
We spent the same amount of time in France and Germany.
You should pay the full amount by the end of the month.
A growing number of people are studying Spanish.
Our boss came with a number of creative ideas this morning.
A large number of questions have been answered by the police.