Therefore, all natural numbers are whole numbers , and all whole numbers are real numbers, but not every real number is a whole number . Zero is the smallest whole number , meanwhile there isn't a biggest whole number because the set of whole numbers is infinite. Learn what whole numbers are, how to identify them, and how to perform operations on them. Find out the properties, examples, and fun facts of whole numbers with SplashLearn. The whole numbers are the counting numbers including 0. In our daily life we come across many solutions where the result cannot be represented by a natural number . Learn what whole numbers are, how they differ from natural numbers, and their basic properties. Whole numbers are a set of numbers including 0 and all positive integers.