18636464612 has 12 divisors (see below), whose sum is σ = 32615466240. Its totient is φ = 9317759976.

The previous prime is 18636464611. The next prime is 18636464681. The reversal of 18636464612 is 21646463681.

It is not an unprimeable number, because it can be changed into a prime (18636464611) 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 3 ways as a sum of consecutive naturals, for example, 20312 + ... + 194127.

It is an arithmetic number, because the mean of its divisors is an integer number (2717955520).

Almost surely, 2^18636464612 is an apocalyptic number.

It is an amenable number.

18636464612 is a deficient number, since it is larger than the sum of its proper divisors (13979001628).

18636464612 is a wasteful number, since it uses less digits than its factorization.

18636464612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 236170 (or 236168 counting only the distinct ones).

The product of its digits is 995328, while the sum is 47.

The spelling of 18636464612 in words is "eighteen billion, six hundred thirty-six million, four hundred sixty-four thousand, six hundred twelve".