I usually use SumatraPDF on Windows, it's super lightweight, fast, and can handle large documents. However, I never tried it with more than 1500 pages or so. No

I usually use SumatraPDF on Windows, it's super lightweight, fast, and can handle large documents. However, I never tried it with more than 1500 pages or so. No idea if it would survive a 24k pages PDF, would be a good test...