$ sudo apt-get update
$ sudo apt-get install libgcrypt20 

libgcrypt20 is installed in your system.

Make ensure the libgcrypt20 package were installed using the commands given below,

$ sudo dpkg-query -l | grep libgcrypt20 *

You will get with libgcrypt20 package name, version, architecture and description in a table

libgcrypt20 package basic information: