18438054 has 12 divisors (see below), whose sum is σ = 36897156. Its totient is φ = 6142512.

The previous prime is 18438029. The next prime is 18438059. The reversal of 18438054 is 45083481.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18438059) by changing a digit.

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 in 5 ways as a sum of consecutive naturals, for example, 9642 + ... + 11394.

It is an arithmetic number, because the mean of its divisors is an integer number (3074763).

Almost surely, 2^18438054 is an apocalyptic number.

18438054 is an abundant number, since it is smaller than the sum of its proper divisors (18459102).

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

18438054 is an frugal number, since it uses more digits than its factorization.

18438054 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3511 (or 1758 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 33.

The square root of 18438054 is about 4293.9555190989. The cubic root of 18438054 is about 264.1830972718.

The spelling of 18438054 in words is "eighteen million, four hundred thirty-eight thousand, fifty-four".