18089525 has 12 divisors (see below), whose sum is σ = 22551012. Its totient is φ = 14394240.

The previous prime is 18089503. The next prime is 18089543. The reversal of 18089525 is 52598081.

It can be written as a sum of positive squares in 6 ways, for example, as 128881 + 17960644 = 359^2 + 4238^2 .

It is not a de Polignac number, because 18089525 - 2¹⁰ = 18088501 is a prime.

It is a Duffinian number.

It is a Curzon number.

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, 3089 + ... + 6761.

It is an arithmetic number, because the mean of its divisors is an integer number (1879251).

Almost surely, 2^18089525 is an apocalyptic number.

It is an amenable number.

18089525 is a deficient number, since it is larger than the sum of its proper divisors (4461487).

18089525 is a wasteful number, since it uses less digits than its factorization.

18089525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3880 (or 3875 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 38.

The square root of 18089525 is about 4253.1782233995. The cubic root of 18089525 is about 262.5079060355.

The spelling of 18089525 in words is "eighteen million, eighty-nine thousand, five hundred twenty-five".