18164925 has 48 divisors (see below), whose sum is σ = 35354880. Its totient is φ = 9112320.

The previous prime is 18164869. The next prime is 18164929. The reversal of 18164925 is 52946181.

18164925 is a `hidden beast` number, since 1 + 8 + 1 + 649 + 2 + 5 = 666.

It is not a de Polignac number, because 18164925 - 2⁹ = 18164413 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18164925.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18164929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 10684 + ... + 12266.

It is an arithmetic number, because the mean of its divisors is an integer number (736560).

Almost surely, 2^18164925 is an apocalyptic number.

18164925 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18164925 is a deficient number, since it is larger than the sum of its proper divisors (17189955).

18164925 is a wasteful number, since it uses less digits than its factorization.

18164925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1619 (or 1608 counting only the distinct ones).

The product of its digits is 17280, while the sum is 36.

The square root of 18164925 is about 4262.0329656163. The cubic root of 18164925 is about 262.8721252797.

The spelling of 18164925 in words is "eighteen million, one hundred sixty-four thousand, nine hundred twenty-five".