18438012364 has 6 divisors (see below), whose sum is σ = 32266521644. Its totient is φ = 9219006180.

The previous prime is 18438012361. The next prime is 18438012367. The reversal of 18438012364 is 46321083481.

It is an interprime number because it is at equal distance from previous prime (18438012361) and next prime (18438012367).

It is not an unprimeable number, because it can be changed into a prime (18438012361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2304751542 + ... + 2304751549.

Almost surely, 2^18438012364 is an apocalyptic number.

It is an amenable number.

18438012364 is a deficient number, since it is larger than the sum of its proper divisors (13828509280).

18438012364 is a wasteful number, since it uses less digits than its factorization.

18438012364 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4609503095 (or 4609503093 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 40.

The spelling of 18438012364 in words is "eighteen billion, four hundred thirty-eight million, twelve thousand, three hundred sixty-four".