From the structure, this seems like:

Here is the detailed explanation why, followed by what this string actually represents and what a user should do instead.

This string closely resembles an auto-generated filename, a URL parameter, or a database reference ID. The elements 14184371 , 10209093408645523 , and 14901 look like sequential user IDs, post IDs, or image asset numbers. imgsrcru suggests an image source URL (possibly from a Russian .ru domain or a content delivery network). fixed implies a repaired or corrected version of an image file.

If you want, I can: