"19" in Engpsh is "nineteen". The number "19" comes from the combination of "ten" and "nine". Here are some example sentences using "nineteen":
The number of people in the room is nineteen.
I will be nineteen years old next month.
The temperature outside is nineteen degrees Celsius.
Note that in Engpsh the word nineteen is used as a number and not as a sound. In order to express the sound of the number nineteen, you can use the phrase "the sound of nineteen" or you can spell it out "nineteen" and use it in a sentence.