18390388672 has 14 divisors (see below), whose sum is σ = 36493427648. Its totient is φ = 9195194304.

The previous prime is 18390388661. The next prime is 18390388693. The reversal of 18390388672 is 27688309381.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 143674848 + ... + 143674975.

Almost surely, 2^18390388672 is an apocalyptic number.

It is an amenable number.

18390388672 is a deficient number, since it is larger than the sum of its proper divisors (18103038976).

18390388672 is an equidigital number, since it uses as much as digits as its factorization.

18390388672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 287349835 (or 287349825 counting only the distinct ones).

The product of its (nonzero) digits is 3483648, while the sum is 55.

The spelling of 18390388672 in words is "eighteen billion, three hundred ninety million, three hundred eighty-eight thousand, six hundred seventy-two".