18732242 has 8 divisors (see below), whose sum is σ = 28116732. Its totient is φ = 9360000.

The previous prime is 18732227. The next prime is 18732247. The reversal of 18732242 is 24223781.

It can be written as a sum of positive squares in 2 ways, for example, as 16394401 + 2337841 = 4049^2 + 1529^2 .

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

It is not an unprimeable number, because it can be changed into a prime (18732247) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 4442 + ... + 7562.

Almost surely, 2^18732242 is an apocalyptic number.

18732242 is a deficient number, since it is larger than the sum of its proper divisors (9384490).

18732242 is a wasteful number, since it uses less digits than its factorization.

18732242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6124.

The product of its digits is 5376, while the sum is 29.

The square root of 18732242 is about 4328.0760159683. The cubic root of 18732242 is about 265.5807460670.

The spelling of 18732242 in words is "eighteen million, seven hundred thirty-two thousand, two hundred forty-two".