Paypal accounts do not have account numbers, your email address identifies your paypal account OR your phone number if using the app.
However unlikely you would need that information as the option to receive paypal payments is sadly not available in Nigeria. You can only send payments for purchases funded by your (confirmed) credit card.
Paypal varies a lot country to country and can only offer the services that the banks / governments of that country allow it to offer. There are quite a few countries unable to receive paypal payments.