18232525 has 6 divisors (see below), whose sum is σ = 22608362. Its totient is φ = 14586000.

The previous prime is 18232523. The next prime is 18232531. The reversal of 18232525 is 52523281.

It can be written as a sum of positive squares in 3 ways, for example, as 2842596 + 15389929 = 1686^2 + 3923^2 .

It is not a de Polignac number, because 18232525 - 2¹ = 18232523 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18232493 and 18232502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18232523) 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, 364626 + ... + 364675.

Almost surely, 2^18232525 is an apocalyptic number.

It is an amenable number.

18232525 is a deficient number, since it is larger than the sum of its proper divisors (4375837).

18232525 is an equidigital number, since it uses as much as digits as its factorization.

18232525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 729311 (or 729306 counting only the distinct ones).

The product of its digits is 4800, while the sum is 28.

The square root of 18232525 is about 4269.9560887672. The cubic root of 18232525 is about 263.1978107698.

The spelling of 18232525 in words is "eighteen million, two hundred thirty-two thousand, five hundred twenty-five".