18566742 has 8 divisors (see below), whose sum is σ = 37133496. Its totient is φ = 6188912.

The previous prime is 18566731. The next prime is 18566767. The reversal of 18566742 is 24766581.

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

18566742 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 18566742.

It is a congruent number.

It is an unprimeable number.

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, 1547223 + ... + 1547234.

It is an arithmetic number, because the mean of its divisors is an integer number (4641687).

Almost surely, 2^18566742 is an apocalyptic number.

18566742 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.

18566742 is a wasteful number, since it uses less digits than its factorization.

18566742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3094462.

The product of its digits is 80640, while the sum is 39.

The square root of 18566742 is about 4308.9142483925. The cubic root of 18566742 is about 264.7962929569.

The spelling of 18566742 in words is "eighteen million, five hundred sixty-six thousand, seven hundred forty-two".