To view your Paytm Payments Bank account number, you can follow these steps:

1. Open the Paytm app and tap on the "Bank Account" icon.
2. Scroll down and click on "Savings Account Details".
3. Enter your Paytm Passcode.
4. Your account number and IFSC code will be displayed.

Alternatively, you can follow these steps:

1. Download and install the official Paytm app.
2. Enter your registered mobile number and log in to your account.
3. Tap on the "Bank" icon under the "My Paytm" section.
4. Enter your account passcode to enter into the banking section.
5. Now tap on "Profile".
6. Your Paytm Payments Bank account number and IFSC code will be shown to you.

It is important to note that you should only download the Paytm app from official sources, such as Google Playstore, to ensure the security of your account information. If you need further assistance, you can contact Paytm customer care or use the support section of the app.