18054438 has 16 divisors (see below), whose sum is σ = 36220080. Its totient is φ = 5999616.

The previous prime is 18054437. The next prime is 18054461. The reversal of 18054438 is 83445081.

It is a junction number, because it is equal to n+sod(n) for n = 18054399 and 18054408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18054437) 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 7 ways as a sum of consecutive naturals, for example, 2443 + ... + 6486.

It is an arithmetic number, because the mean of its divisors is an integer number (2263755).

Almost surely, 2^18054438 is an apocalyptic number.

18054438 is an abundant number, since it is smaller than the sum of its proper divisors (18165642).

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

18054438 is a wasteful number, since it uses less digits than its factorization.

18054438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9271.

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

The square root of 18054438 is about 4249.0514235533. The cubic root of 18054438 is about 262.3380733766.

The spelling of 18054438 in words is "eighteen million, fifty-four thousand, four hundred thirty-eight".