20788025865764 has 6 divisors (see below), whose sum is σ = 36379045265094. Its totient is φ = 10394012932880.

The previous prime is 20788025865743. The next prime is 20788025865769. The reversal of 20788025865764 is 46756852088702.

It can be written as a sum of positive squares in only one way, i.e., 19635533440000 + 1152492425764 = 4431200^2 + 1073542^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20788025865694 and 20788025865703.

It is not an unprimeable number, because it can be changed into a prime (20788025865769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2598503233217 + ... + 2598503233224.

It is an arithmetic number, because the mean of its divisors is an integer number (6063174210849).

Almost surely, 2^{20788025865764} is an apocalyptic number.

It is an amenable number.

20788025865764 is a deficient number, since it is larger than the sum of its proper divisors (15591019399330).

20788025865764 is a wasteful number, since it uses less digits than its factorization.

20788025865764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5197006466445 (or 5197006466443 counting only the distinct ones).

The product of its (nonzero) digits is 361267200, while the sum is 68.

The spelling of 20788025865764 in words is "twenty trillion, seven hundred eighty-eight billion, twenty-five million, eight hundred sixty-five thousand, seven hundred sixty-four".