18363804547 has 16 divisors (see below), whose sum is σ = 20252127744. Its totient is φ = 16512300000.

The previous prime is 18363804497. The next prime is 18363804559. The reversal of 18363804547 is 74540836381.

It is a cyclic number.

It is not a de Polignac number, because 18363804547 - 2⁷ = 18363804419 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18363804547.

It is not an unprimeable number, because it can be changed into a prime (18363805547) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1159798 + ... + 1175524.

It is an arithmetic number, because the mean of its divisors is an integer number (1265757984).

Almost surely, 2^18363804547 is an apocalyptic number.

18363804547 is a deficient number, since it is larger than the sum of its proper divisors (1888323197).

18363804547 is a wasteful number, since it uses less digits than its factorization.

18363804547 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16890.

The product of its (nonzero) digits is 1935360, while the sum is 49.

The spelling of 18363804547 in words is "eighteen billion, three hundred sixty-three million, eight hundred four thousand, five hundred forty-seven".