18087475 has 12 divisors (see below), whose sum is σ = 25632784. Its totient is φ = 12402720.

The previous prime is 18087457. The next prime is 18087479. The reversal of 18087475 is 57478081.

It is not a de Polignac number, because 18087475 - 2⁷ = 18087347 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18087479) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 51504 + ... + 51853.

Almost surely, 2^18087475 is an apocalyptic number.

18087475 is a deficient number, since it is larger than the sum of its proper divisors (7545309).

18087475 is a wasteful number, since it uses less digits than its factorization.

18087475 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103374 (or 103369 counting only the distinct ones).

The product of its (nonzero) digits is 62720, while the sum is 40.

The square root of 18087475 is about 4252.9372203220. The cubic root of 18087475 is about 262.4979894026.

The spelling of 18087475 in words is "eighteen million, eighty-seven thousand, four hundred seventy-five".