18038003465438 has 32 divisors (see below), whose sum is σ = 30444587877600. Its totient is φ = 7943257128960.

The previous prime is 18038003465429. The next prime is 18038003465453. The reversal of 18038003465438 is 83456430083081.

It is a happy number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 18038003465438.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47363363 + ... + 47742686.

It is an arithmetic number, because the mean of its divisors is an integer number (951393371175).

Almost surely, 2^{18038003465438} is an apocalyptic number.

18038003465438 is a deficient number, since it is larger than the sum of its proper divisors (12406584412162).

18038003465438 is a wasteful number, since it uses less digits than its factorization.

18038003465438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95106332.

The product of its (nonzero) digits is 6635520, while the sum is 53.

The spelling of 18038003465438 in words is "eighteen trillion, thirty-eight billion, three million, four hundred sixty-five thousand, four hundred thirty-eight".