An annulment in the legal sense is NOT the same thing as an annulment in the religious sense. A legal annulment means that the marriage was invalid from its inception and there are very limited grounds upon which this can be granted. The most common ground is bigamy. Property division may or may not be different than it would be in divorce, depending upon your circumstances and whether or not you knew of the grounds for annulment when you entered (or remained in) the marriage. (Annulment is also sometimes called nullity.)