noun
number of pages; page count
Refers to the total number of pages in a book, document, or other paginated material.
この本のページ数は300ページです。
This book has 300 pages.
レポートのページ数が足りない。
The report doesn't have enough pages.
Kanji spelling using 頁 for 'page'; less common than ページ数 but still encountered.
Compound of ページ (page, from English) and 数 (number, count).