How to find number of indesign page in pdf page

So i want to know how in a PDF page can i know how many indesign pages are there?

I'm just echoing the same answer as SJRiegel. 

When you export spreads from InDesign, they become pages in Acrobat/Reader. Take a look at my screen shot. The page numbers are shown under each thumbnail in the Navigation panel (at left). There are two pages when you export as spreads: page 1 is the compilation of the first InDesign spread, page 2 is the second InDesign spread.

You can see the page sizes by hovering over the lower left corner of the document window. The first page is 42.5" x 11", the second is 17" x 11.

~Barb 

as SJRiegel has already told you spread is treated in the pdf as a single page.
to visually see how many pages had Indesign you should include crop marks when you export to pdf and in pdf you could see as in my screenshot

Hi

Thanks Barb and SJ

I was not clear in my question i think. 

I will export the PDF as spread from indesign.

So i want to know how in a PDF page can i know how many indesign pages are there?

As you can see in my images, the PDF page 1 has 5 indesign pages. Can i know this from PDF?

or split that first PDF page into 5 indivisual pages based on information in Indesign document?

Hi Stephen:

It depends on how you exported from InDesign—did you export pages or spreads? Either way, the answer is visible in Acrobat or Reader using View > Show/Hide > Navigation Pane > Page Thumbnails.

The main window is controlled by the View settings. The Page Thumbnail pane shows the actual pages.

~Barb 

Exporting as pages

Exporting as spreads

Your InDesign file has a 5-page spread and a two-page spread. You set your PDF export with Spreads instead of Pages checked, so the export exported the spreads set in your document. Once it is exported, Acrobat treats each fomer InDesign spread as a single page.

If you do not want this, you can set the export for Pages instead.