18725 has 12 divisors (see below), whose sum is σ = 26784. Its totient is φ = 12720.

The previous prime is 18719. The next prime is 18731. The reversal of 18725 is 52781.

18725 = 78² + 79² + 80².

It is an interprime number because it is at equal distance from previous prime (18719) and next prime (18731).

It is not a de Polignac number, because 18725 - 2⁶ = 18661 is a prime.

It is an Ulam number.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a plaindrome in base 8.

It is a self number, because there is not a number n which added to its sum of digits gives 18725.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 122 + ... + 228.

It is an arithmetic number, because the mean of its divisors is an integer number (2232).

2¹⁸⁷²⁵ is an apocalyptic number.

It is an amenable number.

18725 is a deficient number, since it is larger than the sum of its proper divisors (8059).

18725 is a wasteful number, since it uses less digits than its factorization.

18725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124 (or 119 counting only the distinct ones).

The product of its digits is 560, while the sum is 23.

The square root of 18725 is about 136.8393218340. The cubic root of 18725 is about 26.5546516605.

It can be divided in two parts, 187 and 25, that added together give a palindrome (212).

The spelling of 18725 in words is "eighteen thousand, seven hundred twenty-five".