20417767934889 has 96 divisors (see below), whose sum is σ = 30806307840000. Its totient is φ = 12009545533440.

The previous prime is 20417767934833. The next prime is 20417767934911. The reversal of 20417767934889 is 98843976771402.

It is not a de Polignac number, because 20417767934889 - 2⁸ = 20417767934633 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20417767934889.

It is not an unprimeable number, because it can be changed into a prime (20417767934819) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 760736532 + ... + 760763370.

It is an arithmetic number, because the mean of its divisors is an integer number (320899040000).

Almost surely, 2^{20417767934889} is an apocalyptic number.

It is an amenable number.

20417767934889 is a deficient number, since it is larger than the sum of its proper divisors (10388539905111).

20417767934889 is a wasteful number, since it uses less digits than its factorization.

20417767934889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27495 (or 27482 counting only the distinct ones).

The product of its (nonzero) digits is 1024192512, while the sum is 75.

The spelling of 20417767934889 in words is "twenty trillion, four hundred seventeen billion, seven hundred sixty-seven million, nine hundred thirty-four thousand, eight hundred eighty-nine".