18438012367 has 2 divisors, whose sum is σ = 18438012368. Its totient is φ = 18438012366.

The previous prime is 18438012361. The next prime is 18438012403. The reversal of 18438012367 is 76321083481.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18438012367 - 2⁷ = 18438012239 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18438012361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9219006183 + 9219006184.

It is an arithmetic number, because the mean of its divisors is an integer number (9219006184).

Almost surely, 2^18438012367 is an apocalyptic number.

18438012367 is a deficient number, since it is larger than the sum of its proper divisors (1).

18438012367 is an equidigital number, since it uses as much as digits as its factorization.

18438012367 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 193536, while the sum is 43.

The spelling of 18438012367 in words is "eighteen billion, four hundred thirty-eight million, twelve thousand, three hundred sixty-seven".