18838742 has 8 divisors (see below), whose sum is σ = 30431856. Its totient is φ = 8694792.

The previous prime is 18838727. The next prime is 18838753. The reversal of 18838742 is 24783881.

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

It is a self number, because there is not a number n which added to its sum of digits gives 18838742.

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, 362258 + ... + 362309.

It is an arithmetic number, because the mean of its divisors is an integer number (3803982).

Almost surely, 2^18838742 is an apocalyptic number.

18838742 is a deficient number, since it is larger than the sum of its proper divisors (11593114).

18838742 is a wasteful number, since it uses less digits than its factorization.

18838742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 724582.

The product of its digits is 86016, while the sum is 41.

The square root of 18838742 is about 4340.3619664724. The cubic root of 18838742 is about 266.0831047926.

The spelling of 18838742 in words is "eighteen million, eight hundred thirty-eight thousand, seven hundred forty-two".