20789659291368 has 32 divisors (see below), whose sum is σ = 56699070795360. Its totient is φ = 6299896754880.

The previous prime is 20789659291361. The next prime is 20789659291397. The reversal of 20789659291368 is 86319295698702.

It is a super-2 number, since 2×20789659291368² (a number of 27 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (75) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 20789659291368.

It is not an unprimeable number, because it can be changed into a prime (20789659291361) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39374354455 + ... + 39374354982.

It is an arithmetic number, because the mean of its divisors is an integer number (1771845962355).

Almost surely, 2^{20789659291368} is an apocalyptic number.

It is an amenable number.

20789659291368 is an abundant number, since it is smaller than the sum of its proper divisors (35909411503992).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20789659291368 is a wasteful number, since it uses less digits than its factorization.

20789659291368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78748709457 (or 78748709453 counting only the distinct ones).

The product of its (nonzero) digits is 705438720, while the sum is 75.

The spelling of 20789659291368 in words is "twenty trillion, seven hundred eighty-nine billion, six hundred fifty-nine million, two hundred ninety-one thousand, three hundred sixty-eight".