20555350368723 has 12 divisors (see below), whose sum is σ = 30024669079080. Its totient is φ = 13549594250016.

The previous prime is 20555350368719. The next prime is 20555350368733. The reversal of 20555350368723 is 32786305355502.

20555350368723 is a `hidden beast` number, since 2 + 0 + 5 + 5 + 5 + 3 + 503 + 68 + 72 + 3 = 666.

It is not a de Polignac number, because 20555350368723 - 2² = 20555350368719 is a prime.

It is a Smith number, since the sum of its digits (54) 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 20555350368723.

It is not an unprimeable number, because it can be changed into a prime (20555350368703) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12831054361 + ... + 12831055962.

It is an arithmetic number, because the mean of its divisors is an integer number (2502055756590).

Almost surely, 2^{20555350368723} is an apocalyptic number.

20555350368723 is a deficient number, since it is larger than the sum of its proper divisors (9469318710357).

20555350368723 is a wasteful number, since it uses less digits than its factorization.

20555350368723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25662110418 (or 25662110415 counting only the distinct ones).

The product of its (nonzero) digits is 22680000, while the sum is 54.

The spelling of 20555350368723 in words is "twenty trillion, five hundred fifty-five billion, three hundred fifty million, three hundred sixty-eight thousand, seven hundred twenty-three".