13. (6 points) There are 120 different five-digit numbers that can be formed using the digits $1,2,3,4,5$. If they are arranged in descending order, the 95th number is $\qquad$
【Analysis】The different five-digit numbers formed by the digits $1,2,3,4,5$ are $5 \times 4 \times 3 \times 2 \times 1=120$ (numbers), following the multiplication principle; When arranged from largest to smallest, the larger the digit in the higher position, the larger the number, the largest number is 54321, when the first digit is 5, there are $4 \times 3 \times 2 \times 1=24$ larger numbers, i.e., the first 24 numbers; The numbers starting with 4, such as 45321, have $4 \times 3 \times 2 \times 1=24$, making the first 48 numbers; The 49th number starts with 3, and $4 \times 3 \times 2 \times 1=24$, there are also 24 numbers; Similarly, the numbers starting with 2 have 24 numbers, $24 \times 4=96$, so the 95th number is the second to last number starting with 2, which is: 21354.
【Solution】Solution: $4 \times 3 \times 2 \times 1=24$, the numbers starting with $5, 4, 3, 2$ each have 24 numbers, $24 \times 4=96$ (numbers),

So when they are arranged from largest to smallest, the 95th number is the second to last number starting with 2, which is 21354. Answer: The 95th number is 21354.

Therefore, the answer is: 21354.