18190625 has 12 divisors (see below), whose sum is σ = 22740732. Its totient is φ = 14550000.

The previous prime is 18190603. The next prime is 18190633. The reversal of 18190625 is 52609181.

It can be written as a sum of positive squares in 6 ways, for example, as 11723776 + 6466849 = 3424^2 + 2543^2 .

It is not a de Polignac number, because 18190625 - 2¹⁶ = 18125089 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 18190591 and 18190600.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 215 + ... + 6035.

It is an arithmetic number, because the mean of its divisors is an integer number (1895061).

Almost surely, 2^18190625 is an apocalyptic number.

It is an amenable number.

18190625 is a deficient number, since it is larger than the sum of its proper divisors (4550107).

18190625 is an frugal number, since it uses more digits than its factorization.

18190625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5846 (or 5826 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 32.

The square root of 18190625 is about 4265.0468930599. The cubic root of 18190625 is about 262.9960386282.

The spelling of 18190625 in words is "eighteen million, one hundred ninety thousand, six hundred twenty-five".