18509032 has 8 divisors (see below), whose sum is σ = 34704450. Its totient is φ = 9254512.

The previous prime is 18509011. The next prime is 18509033. The reversal of 18509032 is 23090581.

It can be written as a sum of positive squares in only one way, i.e., 17355556 + 1153476 = 4166^2 + 1074^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

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

It is not an unprimeable number, because it can be changed into a prime (18509033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1156807 + ... + 1156822.

Almost surely, 2^18509032 is an apocalyptic number.

It is an amenable number.

18509032 is a deficient number, since it is larger than the sum of its proper divisors (16195418).

18509032 is a wasteful number, since it uses less digits than its factorization.

18509032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2313635 (or 2313631 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 18509032 is about 4302.2124540752. The cubic root of 18509032 is about 264.5216575498.

The spelling of 18509032 in words is "eighteen million, five hundred nine thousand, thirty-two".