18039774 has 32 divisors (see below), whose sum is σ = 38283264. Its totient is φ = 5654880.

The previous prime is 18039767. The next prime is 18039779. The reversal of 18039774 is 47793081.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18039779) 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 15 ways as a sum of consecutive naturals, for example, 7347 + ... + 9489.

It is an arithmetic number, because the mean of its divisors is an integer number (1196352).

Almost surely, 2^18039774 is an apocalyptic number.

18039774 is an abundant number, since it is smaller than the sum of its proper divisors (20243490).

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

18039774 is a wasteful number, since it uses less digits than its factorization.

18039774 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2232.

The product of its (nonzero) digits is 42336, while the sum is 39.

The square root of 18039774 is about 4247.3255114248. The cubic root of 18039774 is about 262.2670295796.

The spelling of 18039774 in words is "eighteen million, thirty-nine thousand, seven hundred seventy-four".