What is another name for the counting numbers 1, 2, 3, 4, 5, and so on?

1. The numbers 1, 2, 3, 4, 5, and so on are the counting numbers. 2. These same numbers are also known by another name in mathematics. 3. Counting numbers are also called natural numbers. 4. Whole numbers add zero to this list, so that name describes a different set, and prime and even numbers are only special subsets of it. _Source: OpenStax Prealgebra (CC BY 4.0), Ch 1 "Whole Numbers", section 1.1 Introduction to Whole Numbers_