the paraceratherium died 20 millon years ago

The Paraceratherium a type of hornless Rhino.

Megatherium, wooly mammoth, saber toothed cat, similodon, dinohyus, paraceratherium, brontotherium, glyptodon, toxodon, icaronycteris, and procoptodon. You might want to look up the names on google though

Yes, specimens of the species Paraceratherium (a rhino-like mammal that died out about 23 million years ago) weighed 18 tons, about as much as four elephants do today.

The largest mammal that is ever known to have lived was Paraceratherium, also known as Indricotherium. This animal can be described as a large hornless rhino with an elongated neck and head relative to its body. Paraceratherium had a height of 5.5 m (18 ft), over 8 m (27 ft) in length without the tail, the ability to raise its head 7.5 m (25 ft) over the ground, and a skull length of 1.35 m (4.5 ft). In comparison, the largest land mammal today, the African Bush Elephant, has a height of only 3.5 m (11.5 ft). The tallest giraffes match the height of Paraceratherium, but it weighed 5-10 times more -- estimates range from 10 to 20 tons. Even though this mammal I just explained to you is over-all the largest mammal , the tallest was Megatherium, otherwise known as the Giant Ground Sloth, it stood 21 feet tall, and weighed 16 tons, it was the largest known ancestor of the Three-Toed Sloth.