18378342 has 12 divisors (see below), whose sum is σ = 39819780. Its totient is φ = 6126108.

The previous prime is 18378337. The next prime is 18378379. The reversal of 18378342 is 24387381.

It is a junction number, because it is equal to n+sod(n) for n = 18378297 and 18378306.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 510492 + ... + 510527.

It is an arithmetic number, because the mean of its divisors is an integer number (3318315).

Almost surely, 2^18378342 is an apocalyptic number.

18378342 is an abundant number, since it is smaller than the sum of its proper divisors (21441438).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18378342 is a wasteful number, since it uses less digits than its factorization.

18378342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1021027 (or 1021024 counting only the distinct ones).

The product of its digits is 32256, while the sum is 36.

The square root of 18378342 is about 4286.9968509436. The cubic root of 18378342 is about 263.8976014721.

The spelling of 18378342 in words is "eighteen million, three hundred seventy-eight thousand, three hundred forty-two".