Hi,
Sorry for the delay.
It is possible to highlight the number using below code snippets.
....
.....
..
[0-9]
...
Please refer the simple sample for your reference and let me know if any concerns.
http://websamples.syncfusion.com/samples/Edit/F75754/main.htm
Thank you for your interest in Syncfusion Products.
Regards,
Hema