18745642 has 8 divisors (see below), whose sum is σ = 28148832. Its totient is φ = 9362700.

The previous prime is 18745631. The next prime is 18745681. The reversal of 18745642 is 24654781.

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

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, 2484 + ... + 6607.

It is an arithmetic number, because the mean of its divisors is an integer number (3518604).

Almost surely, 2^18745642 is an apocalyptic number.

18745642 is a deficient number, since it is larger than the sum of its proper divisors (9403190).

18745642 is a wasteful number, since it uses less digits than its factorization.

18745642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10124.

The product of its digits is 53760, while the sum is 37.

The square root of 18745642 is about 4329.6237711838. The cubic root of 18745642 is about 265.6440581851.

The spelling of 18745642 in words is "eighteen million, seven hundred forty-five thousand, six hundred forty-two".