18135475 has 12 divisors (see below), whose sum is σ = 22595776. Its totient is φ = 14438880.

The previous prime is 18135457. The next prime is 18135499. The reversal of 18135475 is 57453181.

It is a happy number.

It is not a de Polignac number, because 18135475 - 2⁷ = 18135347 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18135475.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3949 + ... + 7201.

Almost surely, 2^18135475 is an apocalyptic number.

18135475 is a deficient number, since it is larger than the sum of its proper divisors (4460301).

18135475 is a wasteful number, since it uses less digits than its factorization.

18135475 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3486 (or 3481 counting only the distinct ones).

The product of its digits is 16800, while the sum is 34.

The square root of 18135475 is about 4258.5766401463. The cubic root of 18135475 is about 262.7299874039.

The spelling of 18135475 in words is "eighteen million, one hundred thirty-five thousand, four hundred seventy-five".