The Commutative Property of Multiplication states that changing the order of the factors does not change the product. Therefore, you can rewrite the expression \( a^{20} \cdot x^{3} \) by switching the order of the factors.
Using the Commutative Property, the expression can be rewritten as:
\[ x^{3} \cdot a^{20} \]
Both forms are equivalent, and you can use either one depending on your preference or the context of the problem.