It's a smart engine that has a number of characteristics.

Individuals with a high need for power exhibit a number of characteristics.

Say the distance between two species is the number of characteristics which they don't have in common.

Many products allow classification on a relatively small number of such characteristics.

Such a society also usually has a number of other characteristics :

These numbers depend on the number of characteristics and classes.

Each figure has a number of characteristics with a numerical value.

The number of characteristics that the things being compared share.

An attribute always has a name, and it may have a number of other defining characteristics.