18436242 has 16 divisors (see below), whose sum is σ = 40224672. Its totient is φ = 5586720.

The previous prime is 18436241. The next prime is 18436247. The reversal of 18436242 is 24263481.

It is not an unprimeable number, because it can be changed into a prime (18436241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 139603 + ... + 139734.

It is an arithmetic number, because the mean of its divisors is an integer number (2514042).

Almost surely, 2^18436242 is an apocalyptic number.

18436242 is an abundant number, since it is smaller than the sum of its proper divisors (21788430).

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

18436242 is a wasteful number, since it uses less digits than its factorization.

18436242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 279353.

The product of its digits is 9216, while the sum is 30.

The square root of 18436242 is about 4293.7445196472. The cubic root of 18436242 is about 264.1744427892.

The spelling of 18436242 in words is "eighteen million, four hundred thirty-six thousand, two hundred forty-two".