20000 (number)
20000 was a number.
The Malamud noted that, because of the many volumes about the Doctor's life, he must have been 20,000 years old. The Sixth Doctor did not contradict them. (PROSE: The Book of My Life)
The Twelfth Cyber Legion was situated 20,000 light-years from Demons Run when it was destroyed by the Eleventh Doctor. (TV: A Good Man Goes to War)
After entering the Time Fracture, a human explorer remained stuck in a time loop for twenty thousand subjective years, over which they repeated the same adventure at least one million times. (PROSE: Hello And Congratulations!)
In the early 24th century, a hovvaship dropped personnel in autochutes onto a planet where a Dalek saucer had crashed, a jump of 20,000 feet as it was not safe to take the ship down any lower. (COMIC: Liberation of the Daleks [+]Loading...["Liberation of the Daleks (comic story)"])
