18042774 has 8 divisors (see below), whose sum is σ = 36085560. Its totient is φ = 6014256.

The previous prime is 18042749. The next prime is 18042779. The reversal of 18042774 is 47724081.

It is a sphenic number, since it is the product of 3 distinct primes.

18042774 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18042779) 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 3 ways as a sum of consecutive naturals, for example, 1503559 + ... + 1503570.

It is an arithmetic number, because the mean of its divisors is an integer number (4510695).

Almost surely, 2^18042774 is an apocalyptic number.

18042774 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

18042774 is a wasteful number, since it uses less digits than its factorization.

18042774 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3007134.

The product of its (nonzero) digits is 12544, while the sum is 33.

The square root of 18042774 is about 4247.6786601625. The cubic root of 18042774 is about 262.2815670396.

The spelling of 18042774 in words is "eighteen million, forty-two thousand, seven hundred seventy-four".