18042756 has 48 divisors (see below), whose sum is σ = 43982400. Its totient is φ = 5749632.

The previous prime is 18042749. The next prime is 18042779. The reversal of 18042756 is 65724081.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48186 + ... + 48558.

It is an arithmetic number, because the mean of its divisors is an integer number (916300).

Almost surely, 2^18042756 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18042756, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21991200).

18042756 is an abundant number, since it is smaller than the sum of its proper divisors (25939644).

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

18042756 is a wasteful number, since it uses less digits than its factorization.

18042756 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 548 (or 546 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 33.

The square root of 18042756 is about 4247.6765413576. The cubic root of 18042756 is about 262.2814798196.

It can be divided in two parts, 1804 and 2756, that added together give a triangular number (4560 = T₉₅).

The spelling of 18042756 in words is "eighteen million, forty-two thousand, seven hundred fifty-six".