19. A riot broke out in the Kingdom of Natural Numbers. Among the digits from $0 \sim 9$, the larger digits felt superior and refused to be placed behind smaller digits when appearing together. Thus, natural numbers like 36, 121, and 1234 disappeared, leaving only numbers like $2, 55, 433, 4321$ intact. So, among the original natural numbers from 1 to 2022, how many numbers remain? $\qquad$
$287$