Using the Commutative Property of Multiplication, we can rearrange the factors in the expression \( a^{20} \cdot x^3 \). This property states that the order of multiplication does not affect the result.
Thus, we can rewrite the expression as:
\[ x^3 \cdot a^{20} \]
Either ordering \( a^{20} \cdot x^3 \) or \( x^3 \cdot a^{20} \) is valid due to the commutative property.