18742942 has 32 divisors (see below), whose sum is σ = 31321728. Its totient is φ = 8372736.

The previous prime is 18742909. The next prime is 18742957. The reversal of 18742942 is 24924781.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 58968 + ... + 59284.

It is an arithmetic number, because the mean of its divisors is an integer number (978804).

Almost surely, 2^18742942 is an apocalyptic number.

18742942 is a deficient number, since it is larger than the sum of its proper divisors (12578786).

18742942 is a wasteful number, since it uses less digits than its factorization.

18742942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 420.

The product of its digits is 32256, while the sum is 37.

The square root of 18742942 is about 4329.3119545720. The cubic root of 18742942 is about 265.6313036935.

The spelling of 18742942 in words is "eighteen million, seven hundred forty-two thousand, nine hundred forty-two".