Follow these simple steps to get your stolen android device IMEI number.
1- Goto your Gmail’s account setting.
2- Then click on this link “Go to the Dashboard to see all data stored in your account.”
3- On this you will find a section “Android devices”. In this section there will be a list of all the devices connected to your Gmail account.
4- Click on “More data stored about this device” to see more details about the device. There you will find the device IMEI number.