18023732 has 12 divisors (see below), whose sum is σ = 32629380. Its totient is φ = 8701056.

The previous prime is 18023729. The next prime is 18023777. The reversal of 18023732 is 23732081.

It can be written as a sum of positive squares in 2 ways, for example, as 12138256 + 5885476 = 3484^2 + 2426^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 77573 + ... + 77804.

It is an arithmetic number, because the mean of its divisors is an integer number (2719115).

Almost surely, 2^18023732 is an apocalyptic number.

It is an amenable number.

18023732 is a deficient number, since it is larger than the sum of its proper divisors (14605648).

18023732 is a wasteful number, since it uses less digits than its factorization.

18023732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155410 (or 155408 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 18023732 is about 4245.4366088778. The cubic root of 18023732 is about 262.1892655709.

The spelling of 18023732 in words is "eighteen million, twenty-three thousand, seven hundred thirty-two".