18545442 has 32 divisors (see below), whose sum is σ = 39113280. Its totient is φ = 5853120.

The previous prime is 18545381. The next prime is 18545467. The reversal of 18545442 is 24454581.

It is a happy 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 15 ways as a sum of consecutive naturals, for example, 8217 + ... + 10227.

It is an arithmetic number, because the mean of its divisors is an integer number (1222290).

Almost surely, 2^18545442 is an apocalyptic number.

18545442 is an abundant number, since it is smaller than the sum of its proper divisors (20567838).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18545442 is a wasteful number, since it uses less digits than its factorization.

18545442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2098.

The product of its digits is 25600, while the sum is 33.

The square root of 18545442 is about 4306.4419188003. The cubic root of 18545442 is about 264.6949949974.

The spelling of 18545442 in words is "eighteen million, five hundred forty-five thousand, four hundred forty-two".