Voicemail now reads caller id as a numeric

For about a week now, I have noticed that the caller id on any voicemails reads like a numeric number, so for instance, a number of 6105555555 will be read at the beginning of the voicemail as '6 billion, 105 million', etc, rather than just reading the number - six, one, zero... Is there a new setting to get this back to the way it was before? Thanks for any information.