18542994 has 32 divisors (see below), whose sum is σ = 38511936. Its totient is φ = 5947200.

The previous prime is 18542989. The next prime is 18543011. The reversal of 18542994 is 49924581.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22009 + ... + 22835.

It is an arithmetic number, because the mean of its divisors is an integer number (1203498).

Almost surely, 2^18542994 is an apocalyptic number.

18542994 is an abundant number, since it is smaller than the sum of its proper divisors (19968942).

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

18542994 is a wasteful number, since it uses less digits than its factorization.

18542994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 970.

The product of its digits is 103680, while the sum is 42.

The square root of 18542994 is about 4306.1576840613. The cubic root of 18542994 is about 264.6833478972.

The spelling of 18542994 in words is "eighteen million, five hundred forty-two thousand, nine hundred ninety-four".