Arjun Bhardwaj, who hailed from Bengaluru, was studying at a college in suburban Vile Parle, a senior police official said.
Mr Bhardwaj had booked a suite on the 19th floor of a star hotel in the wee hours of Monday. He jumped from the room by breaking the glass of the window around 6:30 PM, the official said.
According to police, Mr Bhardwaj had posted a video on a social networking site about steps to kill oneself before taking the extreme step.
"I'm a drug addict..I don't want to live anymore and hence committing suicide," the official said, quoting the suicide note purportedly written by him.
The suicide note was found from the hotel room.
He was taken to nearby hospital where doctors declared him brought dead.
Mr Bhardwaj had submitted proper documents before checking in, which helped the officials identify him.
His body has been sent for post-mortem.