18507332 has 6 divisors (see below), whose sum is σ = 32387838. Its totient is φ = 9253664.

The previous prime is 18507323. The next prime is 18507337. The reversal of 18507332 is 23370581.

It can be written as a sum of positive squares in only one way, i.e., 11195716 + 7311616 = 3346^2 + 2704^2 .

It is a junction number, because it is equal to n+sod(n) for n = 18507295 and 18507304.

It is not an unprimeable number, because it can be changed into a prime (18507337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2313413 + ... + 2313420.

It is an arithmetic number, because the mean of its divisors is an integer number (5397973).

Almost surely, 2^18507332 is an apocalyptic number.

It is an amenable number.

18507332 is a deficient number, since it is larger than the sum of its proper divisors (13880506).

18507332 is a wasteful number, since it uses less digits than its factorization.

18507332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4626837 (or 4626835 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 18507332 is about 4302.0148767758. The cubic root of 18507332 is about 264.5135587905.

The spelling of 18507332 in words is "eighteen million, five hundred seven thousand, three hundred thirty-two".