18206825 has 48 divisors (see below), whose sum is σ = 28498176. Its totient is φ = 11232000.

The previous prime is 18206821. The next prime is 18206831. The reversal of 18206825 is 52860281.

It is not a de Polignac number, because 18206825 - 2² = 18206821 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18206791 and 18206800.

It is not an unprimeable number, because it can be changed into a prime (18206821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 120500 + ... + 120650.

It is an arithmetic number, because the mean of its divisors is an integer number (593712).

Almost surely, 2^18206825 is an apocalyptic number.

It is an amenable number.

18206825 is a deficient number, since it is larger than the sum of its proper divisors (10291351).

18206825 is a wasteful number, since it uses less digits than its factorization.

18206825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 234 (or 229 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 32.

The square root of 18206825 is about 4266.9456289013. The cubic root of 18206825 is about 263.0740874708.

The spelling of 18206825 in words is "eighteen million, two hundred six thousand, eight hundred twenty-five".