The number 092813-670 is probably the video ID, and .part20.rar means it’s the 20th segment of the archive (so there are at least 20 parts, e.g., .part01.rar through .part20.rar or more).
It looks like you’re referencing a specific file: 092813-670-1pon-4K.part20.rar 092813-670-1pon-4K.part20.rar
This naming pattern suggests it’s a (part of a multi-part set) — likely a video file from the label 1PONDO (a Japanese adult video distributor), with 4K resolution. The number 092813-670 is probably the video ID, and