18478475 has 12 divisors (see below), whose sum is σ = 22971744. Its totient is φ = 14745120.

The previous prime is 18478463. The next prime is 18478477. The reversal of 18478475 is 57487481.

It is a de Polignac number, because none of the positive numbers 2^k-18478475 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18478477) 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, 13262 + ... + 14588.

It is an arithmetic number, because the mean of its divisors is an integer number (1914312).

Almost surely, 2^18478475 is an apocalyptic number.

18478475 is a deficient number, since it is larger than the sum of its proper divisors (4493269).

18478475 is a wasteful number, since it uses less digits than its factorization.

18478475 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1894 (or 1889 counting only the distinct ones).

The product of its digits is 250880, while the sum is 44.

The square root of 18478475 is about 4298.6596748289. The cubic root of 18478475 is about 264.3760090090.

The spelling of 18478475 in words is "eighteen million, four hundred seventy-eight thousand, four hundred seventy-five".