I have lost the number I used for my Apple ID and also forgotten my password

About the password:

Click on this link to read what to do "If you forgot your Apple ID [Account] password" --> If you forgot your Apple ID password - Apple Support

To see how to 'Get a verification code and sign in with two-factor authentication', click here --> Get a verification code and sign in with two-factor authentication - Apple Support

- Use a Trusted Device: Mac, iPhone, iPad, Watch. Code is either generated automatically or manually using Settings on the Trusted Device.

- Text or phone call to a trusted telephone number (any telephone; even landlines).

- Get a code from an Account Recovery Contact --> Set up an account recovery contact - Apple Support

- Instructions at the end about what to do if you cannot get a code and need to use account recovery.

If you lack a way to view a verification code but can still log into your Apple Account, you can add a way to get a code. "You can manage your trusted phone numbers, trusted devices, and other account information from your Apple ID account page." Click here --> https://appleid.apple.com/

From: Two-factor authentication for Apple ID - Apple Support

If you have no available trusted devices or numbers, and cannot sign into your account (such as when you have a forgotten password) to add a way to get a verification code, read:

How to use account recovery when you can’t reset your Apple ID password - How to use account recovery when you can’t reset your Apple ID password - Apple Support

"The fastest and easiest way to reset your password is from an Apple device. Before you start the account recovery waiting period, try to reset your forgotten password on a trusted device. Or borrow a friend or family member’s iPhone, iPad, or iPod touch and use the Find My iPhone app to reset your password. You can even visit an Apple Store and ask to use a device on site."