18740232 has 144 divisors (see below), whose sum is σ = 61813440. Its totient is φ = 5023296.

The previous prime is 18740231. The next prime is 18740257. The reversal of 18740232 is 23204781.

It is a junction number, because it is equal to n+sod(n) for n = 18740196 and 18740205.

It is not an unprimeable number, because it can be changed into a prime (18740231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 181893 + ... + 181995.

It is an arithmetic number, because the mean of its divisors is an integer number (429260).

Almost surely, 2^18740232 is an apocalyptic number.

18740232 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18740232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30906720).

18740232 is an abundant number, since it is smaller than the sum of its proper divisors (43073208).

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

18740232 is a wasteful number, since it uses less digits than its factorization.

18740232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160 (or 134 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 18740232 is about 4328.9989604988. The cubic root of 18740232 is about 265.6185007314.

The spelling of 18740232 in words is "eighteen million, seven hundred forty thousand, two hundred thirty-two".