18308825 has 12 divisors (see below), whose sum is σ = 22907388. Its totient is φ = 14515200.

The previous prime is 18308819. The next prime is 18308827. The reversal of 18308825 is 52880381.

It can be written as a sum of positive squares in 6 ways, for example, as 635209 + 17673616 = 797^2 + 4204^2 .

It is not a de Polignac number, because 18308825 - 2¹⁴ = 18292441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18308827) 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, 416 + ... + 6065.

It is an arithmetic number, because the mean of its divisors is an integer number (1908949).

Almost surely, 2^18308825 is an apocalyptic number.

It is an amenable number.

18308825 is a deficient number, since it is larger than the sum of its proper divisors (4598563).

18308825 is a wasteful number, since it uses less digits than its factorization.

18308825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6604 (or 6599 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 35.

The square root of 18308825 is about 4278.8812790261. The cubic root of 18308825 is about 263.5644457563.

The spelling of 18308825 in words is "eighteen million, three hundred eight thousand, eight hundred twenty-five".