18744232 has 16 divisors (see below), whose sum is σ = 37849140. Its totient is φ = 8651136.

The previous prime is 18744227. The next prime is 18744233. The reversal of 18744232 is 23244781.

It can be written as a sum of positive squares in 2 ways, for example, as 18028516 + 715716 = 4246^2 + 846^2 .

It is a junction number, because it is equal to n+sod(n) for n = 18744194 and 18744203.

It is not an unprimeable number, because it can be changed into a prime (18744233) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 90013 + ... + 90220.

Almost surely, 2^18744232 is an apocalyptic number.

It is an amenable number.

18744232 is an abundant number, since it is smaller than the sum of its proper divisors (19104908).

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

18744232 is a wasteful number, since it uses less digits than its factorization.

18744232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180252 (or 180248 counting only the distinct ones).

The product of its digits is 10752, while the sum is 31.

The square root of 18744232 is about 4329.4609364215. The cubic root of 18744232 is about 265.6373976589.

The spelling of 18744232 in words is "eighteen million, seven hundred forty-four thousand, two hundred thirty-two".