18477 has 6 divisors (see below), whose sum is σ = 26702. Its totient is φ = 12312.

The previous prime is 18461. The next prime is 18481. The reversal of 18477 is 77481.

It can be written as a sum of positive squares in only one way, i.e., 15876 + 2601 = 126^2 + 51^2 .

It is not a de Polignac number, because 18477 - 2⁴ = 18461 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 13.

It is a self number, because there is not a number n which added to its sum of digits gives 18477.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 18477.

It is not an unprimeable number, because it can be changed into a prime (18427) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1018 + ... + 1035.

2¹⁸⁴⁷⁷ is an apocalyptic number.

It is an amenable number.

18477 is a deficient number, since it is larger than the sum of its proper divisors (8225).

18477 is a wasteful number, since it uses less digits than its factorization.

18477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2059 (or 2056 counting only the distinct ones).

The product of its digits is 1568, while the sum is 27.

The square root of 18477 is about 135.9301291105. The cubic root of 18477 is about 26.4368974428.

The spelling of 18477 in words is "eighteen thousand, four hundred seventy-seven".