Why so many ports are opened? Is it secure?

[stastnypremysl]

Plan

Premium

Country

Czechia

Operating System

Gentoo

My Question or Issue

Why are opened all of these ports please?

Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name
tcp 0 0 0.0.0.0:55721 0.0.0.0:* LISTEN 26860/spotify
tcp 0 0 0.0.0.0:57621 0.0.0.0:* LISTEN 26860/spotify
udp 0 0 0.0.0.0:60758 0.0.0.0:* 26860/spotify
udp 0 0 0.0.0.0:57621 0.0.0.0:* 26860/spotify
udp 0 0 0.0.0.0:50055 0.0.0.0:* 26860/spotify
udp 0 0 0.0.0.0:1900 0.0.0.0:* 26860/spotify

I have a really bad feeling about making backdoor to my system. Are they secure?

Thank you.