what is the number?

19
I am sad no one answerd my yesterdays question so I will post the answer for every unanswered question at the next day.
Answer for yesterday's question is 20.
nesan, proud to be in V+ Team.
Todays question
What is the missed number in that diagram?.
And post the number puzzle in this thread if you also having an intresting one..


Attached Files Thumbnail(s)
   
nesan, proud to be in V+ Team.
i think ,its  19
MUKIL, proud to be a member of Vidyarthiplus.com (V+) - Online Students Community since Mar 2013.

    what is the number?