18636064028 has 24 divisors (see below), whose sum is σ = 33187190400. Its totient is φ = 9154212848.

The previous prime is 18636064009. The next prime is 18636064079. The reversal of 18636064028 is 82046063681.

It is a self number, because there is not a number n which added to its sum of digits gives 18636064028.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 354683 + ... + 403821.

It is an arithmetic number, because the mean of its divisors is an integer number (1382799600).

Almost surely, 2^18636064028 is an apocalyptic number.

It is an amenable number.

18636064028 is a deficient number, since it is larger than the sum of its proper divisors (14551126372).

18636064028 is a wasteful number, since it uses less digits than its factorization.

18636064028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50809 (or 50807 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 44.

The spelling of 18636064028 in words is "eighteen billion, six hundred thirty-six million, sixty-four thousand, twenty-eight".