The commutative property of multiplication states that the order of multiplication does not affect the product. This means that you can rearrange the factors in any way.
For the expression \( a^{20} \cdot x^3 \), you can rewrite it by switching the order of the factors. Using the commutative property, it can be expressed as:
\[ x^3 \cdot a^{20} \]
So, both \( a^{20} \cdot x^3 \) and \( x^3 \cdot a^{20} \) are equivalent expressions due to the commutative property of multiplication.