Zero.

The angular momentum number shows the shape of the electron cloud or the orbital. The magnetic quantum number, on the other hand, determines the number of orbitals and their orientation within a subshell.

An atomic orbital is a mathematical term signifying the characteristics of the 'orbit' or cloud created by movement of an electron or pair of electrons within an atom. Angular momentum, signified as l, defines the angular momentum of the orbital's path as opposed to values n and m which correspond with the orbital's energy and angular direction, respectively.

The angular momentum quantum number, symbolized by l, indicates the shape of an orbital.

magnetic moment of a particle is due to its motion around some other orbits or about its own orbit i.e due to its orbital angular momentum or its spin angular momentum.