18475 has 6 divisors (see below), whose sum is σ = 22940. Its totient is φ = 14760.

The previous prime is 18461. The next prime is 18481. The reversal of 18475 is 57481.

18475 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 18475 - 2⁵ = 18443 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25), and also a Moran number because the ratio is a prime number: 739 = 18475 / (1 + 8 + 4 + 7 + 5).

18475 is a lucky number.

It is a nialpdrome in base 13.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 345 + ... + 394.

2¹⁸⁴⁷⁵ is an apocalyptic number.

18475 is a deficient number, since it is larger than the sum of its proper divisors (4465).

18475 is an equidigital number, since it uses as much as digits as its factorization.

18475 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 749 (or 744 counting only the distinct ones).

The product of its digits is 1120, while the sum is 25.

The square root of 18475 is about 135.9227721907. The cubic root of 18475 is about 26.4359435415.

The spelling of 18475 in words is "eighteen thousand, four hundred seventy-five".