18290925 has 18 divisors (see below), whose sum is σ = 32761482. Its totient is φ = 9755040.

The previous prime is 18290903. The next prime is 18290927. The reversal of 18290925 is 52909281.

It can be written as a sum of positive squares in 3 ways, for example, as 66564 + 18224361 = 258^2 + 4269^2 .

It is not a de Polignac number, because 18290925 - 2⁵ = 18290893 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18290925.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18290927) 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 17 ways as a sum of consecutive naturals, for example, 40422 + ... + 40871.

Almost surely, 2^18290925 is an apocalyptic number.

18290925 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18290925 is a deficient number, since it is larger than the sum of its proper divisors (14470557).

18290925 is a wasteful number, since it uses less digits than its factorization.

18290925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81309 (or 81301 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 36.

The square root of 18290925 is about 4276.7890993127. The cubic root of 18290925 is about 263.4785246790.

The spelling of 18290925 in words is "eighteen million, two hundred ninety thousand, nine hundred twenty-five".