18488475 has 18 divisors (see below), whose sum is σ = 33115316. Its totient is φ = 9860400.

The previous prime is 18488447. The next prime is 18488489. The reversal of 18488475 is 57488481.

It is not a de Polignac number, because 18488475 - 2⁵ = 18488443 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

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 18488475.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 40861 + ... + 41310.

Almost surely, 2^18488475 is an apocalyptic number.

18488475 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

18488475 is a deficient number, since it is larger than the sum of its proper divisors (14626841).

18488475 is a wasteful number, since it uses less digits than its factorization.

18488475 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82187 (or 82179 counting only the distinct ones).

The product of its digits is 286720, while the sum is 45.

The square root of 18488475 is about 4299.8226707621. The cubic root of 18488475 is about 264.4236912145.

The spelling of 18488475 in words is "eighteen million, four hundred eighty-eight thousand, four hundred seventy-five".