18508242 has 32 divisors (see below), whose sum is σ = 39225600. Its totient is φ = 5805648.

The previous prime is 18508219. The next prime is 18508249. The reversal of 18508242 is 24280581.

It is not an unprimeable number, because it can be changed into a prime (18508249) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19953 + ... + 20859.

It is an arithmetic number, because the mean of its divisors is an integer number (1225800).

Almost surely, 2^18508242 is an apocalyptic number.

18508242 is an abundant number, since it is smaller than the sum of its proper divisors (20717358).

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

18508242 is a wasteful number, since it uses less digits than its factorization.

18508242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1110.

The product of its (nonzero) digits is 5120, while the sum is 30.

The square root of 18508242 is about 4302.1206398705. The cubic root of 18508242 is about 264.5178940704.

The spelling of 18508242 in words is "eighteen million, five hundred eight thousand, two hundred forty-two".