Access 'Ticket Number' (not ID) from Ticket object

Access 'Ticket Number' (not ID) from Ticket object

As per here:
https://www.zoho.com/desk/extensions/guide/#data-apis

I can access the Ticket Object from the API
  1. ZOHODESK.get("ticket.id").then(function(response){
    console.log(response);
    }))
For example, I can access the TIcket ID using "ticket"."id"

  1. {status: "success", ticket.id: "11761000001055219"}
    1. status: "success"
    2. ticket.id: "11761000001055219"
    3. __proto__: Object

What is not clear, is how I access the ticket number:

​#23222 My Support Ticket 

How can I access #23222 from within an extension using the API/Objects?