  Ground-state properties of A = 20 nuclei ($^{20}$N, $^{20}$O, $^{20}$F,
$^{20}$Ne, $^{20}$Na, $^{20}$Mg) are described in the framework of Relativistic
Hartree-Bogoliubov (RHB) theory. The model uses the NL3 effective interaction
in the mean-field Lagrangian, and describes pairing correlations by the pairing
part of the finite range Gogny interaction D1S. Binding energies, quadrupole
deformations, nuclear matter radii, and differences in radii of proton and
neutron distributions are compared with recent experimental data.
