O=[N+]([O-])c1ccc(N/N=C/c2sc(N3CCOCC3)nc2-c2ccccc2)c(S(=O)(=O)Nc2ccccc2Cl)c1
Heavy atom refers to any atom that is not hydrogen. The heavy atoms in molecules are carbon, oxygen, nitrogen, and sulfur. How many heavy atoms are in the molecule?