Apple ID security
i recently got back on my I Pad 2 and need to access my Apple Id security. I recently lost my phone and need access to my iPad. Its asking for my phone number to verify its me. Since i don't have my phone i can't do this. Was hoping someone could tell me how i can do it through my email or if i can't. Please help!!!!
iPad 2 Wi-Fi, iOS 9.3.5, Apple iPad 2