18721604058 has 32 divisors (see below), whose sum is σ = 39422246400. Its totient is φ = 5910834096.

The previous prime is 18721604053. The next prime is 18721604071. The reversal of 18721604058 is 85040612781.

It is not an unprimeable number, because it can be changed into a prime (18721604051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 628285 + ... + 657407.

It is an arithmetic number, because the mean of its divisors is an integer number (1231945200).

Almost surely, 2^18721604058 is an apocalyptic number.

18721604058 is an abundant number, since it is smaller than the sum of its proper divisors (20700642342).

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

18721604058 is a wasteful number, since it uses less digits than its factorization.

18721604058 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34786.

The product of its (nonzero) digits is 107520, while the sum is 42.

The spelling of 18721604058 in words is "eighteen billion, seven hundred twenty-one million, six hundred four thousand, fifty-eight".