The life expectancy of a cat depends on various factors such as breed, genetics, nutrition, lifestyle, and preventative care. Indoor cats generally live longer than outdoor cats due to being less exposed to risks such as infectious diseases, trauma, and parasites. According to the search results, the average lifespan of a domestic cat ranges from 10 to 20 years, with indoor cats living from 12 to 18 years of age on average. However, some cats may live beyond 20 years, and the oldest reported cat, Creme Puff, lived to be 38 years old. It is important to note that as cats age, they undergo predictable changes in health and behavior, and senior cats may face common issues such as sensitive teeth and dental problems. To help cats live longer, cat owners can provide a balanced diet, maintain a healthy weight range, exercise regularly, and provide a stress-free environment. Regular veterinary check-ups, including a physical examination, are also important to keep cats fit and healthy.