The ornamental design for the disposable decorative number shaped baking pan, as described and shown.
FIG. 1 is a front side elevation of the disposable decorative number shaped baking pan
FIG. 2 is a rear side elevation of the disposable decorative number shaped baking pan
FIG. 3 is a right side elevation of the disposable decorative number shaped baking pan
FIG. 4 is a left side elevation of the disposable decorative number shaped baking pan
FIG. 5 is a top plan view of the disposable decorative number shaped baking pan; and,
FIG. 6 is a bottom plan view of the disposable decorative number shaped baking pan.
Broken lines are included for the purpose of illustrating portions of the disposable decorative number shaped baking pan and form no part of the claimed design.