I live in India, but few universities are demanding SSN,Can SSN be given to those people also who are trying to go to study in USA? I have never travelled to USA so far.
You generally do not need a social security number to register for school in the United States. Call the school and tell them you do not have one, and find out if they require them for international students.
You may choose to get one if you intend to work in the United States and are authorized to do so.