18945232 has 10 divisors (see below), whose sum is σ = 36706418. Its totient is φ = 9472608.

The previous prime is 18945217. The next prime is 18945233. The reversal of 18945232 is 23254981.

It can be written as a sum of positive squares in only one way, i.e., 17106496 + 1838736 = 4136^2 + 1356^2 .

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18945233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 592023 + ... + 592054.

Almost surely, 2^18945232 is an apocalyptic number.

It is an amenable number.

18945232 is a deficient number, since it is larger than the sum of its proper divisors (17761186).

18945232 is a wasteful number, since it uses less digits than its factorization.

18945232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1184085 (or 1184079 counting only the distinct ones).

The product of its digits is 17280, while the sum is 34.

The square root of 18945232 is about 4352.6120893091. The cubic root of 18945232 is about 266.5835268596.

The spelling of 18945232 in words is "eighteen million, nine hundred forty-five thousand, two hundred thirty-two".