18418742 has 8 divisors (see below), whose sum is σ = 27783000. Its totient is φ = 9157744.

The previous prime is 18418739. The next prime is 18418759. The reversal of 18418742 is 24781481.

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

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, 25367 + ... + 26082.

It is an arithmetic number, because the mean of its divisors is an integer number (3472875).

Almost surely, 2^18418742 is an apocalyptic number.

18418742 is a deficient number, since it is larger than the sum of its proper divisors (9364258).

18418742 is a wasteful number, since it uses less digits than its factorization.

18418742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51630.

The product of its digits is 14336, while the sum is 35.

The square root of 18418742 is about 4291.7061875203. The cubic root of 18418742 is about 264.0908300102.

The spelling of 18418742 in words is "eighteen million, four hundred eighteen thousand, seven hundred forty-two".