To help me give you more specific advice or instructions, please let me know:

this file? (e.g., an email attachment, a download site, or found on your hard drive?) What operating system are you currently using? Have you already attempted to open or extract it?

In very specific, isolated cases, numeric filenames like this appear in academic library databases or automated university backup systems (for example, some archived university course materials use sequential inventory numbers for file storage). However, unless you are actively downloading a specific numbered paper directly from a university repository, assume the file is dangerous.

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Malicious files often prompt you to turn off your security software to complete extraction. Never do this.

2020, 21823, 21823.rar · Математика 2, Рустемова Қ.Ж., Тлесбаева Ж.А. 2020, 21822, 21822.rar · Математический анализ, Рустемова К. articles.ukgu.kz Труды ППС | Альма-матер

Upload the unopened file to the VirusTotal online scanner to see if dozens of different antivirus engines flag it as a threat.