I don't think you can change the node number (and I wouldn't reccomend it). This is a unique number used by Drupal.
You could set the content type to have a date field, and then use the auto path module to pull this data into the URL. This information would also then be usable by Views.
If you want to count the number of nodes of that content type then use Serial Field - that will also be accessible to URL alias and views. Details from its project page:
Unlike Drupal's built-in auto-increment node ID, which is global and shared by nodes belonging to all content types, serial fields are managed per content type (D6) / entity (D7). For example, the serial field of an Invoice instance will generate a unique sequential number (starting at 1, then 2, etc.) exclusively for Invoice instances.
The allocation of serial numbers by this module is atomic. In other words, the serial values are unique even when multiple instances of the same content type / entity are created simultaneously.
Brief explanation but can provide more step by step detail if you want.