18425 has 12 divisors (see below), whose sum is σ = 25296. Its totient is φ = 13200.

The previous prime is 18413. The next prime is 18427. The reversal of 18425 is 52481.

It is not a de Polignac number, because 18425 - 2⁸ = 18169 is a prime.

It is a hoax number, since the sum of its digits (20) coincides with the sum of the digits of its distinct prime factors.

It is an Ulam number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18397 and 18406.

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 11 ways as a sum of consecutive naturals, for example, 242 + ... + 308.

It is an arithmetic number, because the mean of its divisors is an integer number (2108).

2¹⁸⁴²⁵ is an apocalyptic number.

It is an amenable number.

18425 is a deficient number, since it is larger than the sum of its proper divisors (6871).

18425 is a wasteful number, since it uses less digits than its factorization.

18425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88 (or 83 counting only the distinct ones).

The product of its digits is 320, while the sum is 20.

The square root of 18425 is about 135.7387196050. The cubic root of 18425 is about 26.4120736021.

The spelling of 18425 in words is "eighteen thousand, four hundred twenty-five".