18190925 has 12 divisors (see below), whose sum is σ = 22984020. Its totient is φ = 14277120.

The previous prime is 18190919. The next prime is 18190967. The reversal of 18190925 is 52909181.

It can be written as a sum of positive squares in 6 ways, for example, as 162409 + 18028516 = 403^2 + 4246^2 .

It is a de Polignac number, because none of the positive numbers 2^k-18190925 is a prime.

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 5540 + ... + 8189.

It is an arithmetic number, because the mean of its divisors is an integer number (1915335).

Almost surely, 2^18190925 is an apocalyptic number.

It is an amenable number.

18190925 is a deficient number, since it is larger than the sum of its proper divisors (4793095).

18190925 is a wasteful number, since it uses less digits than its factorization.

18190925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13792 (or 13787 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 35.

The square root of 18190925 is about 4265.0820625165. The cubic root of 18190925 is about 262.9974843982.

The spelling of 18190925 in words is "eighteen million, one hundred ninety thousand, nine hundred twenty-five".