16180925 has 18 divisors (see below), whose sum is σ = 20570298. Its totient is φ = 12626080.

The previous prime is 16180919. The next prime is 16180949. The reversal of 16180925 is 52908161.

It can be written as a sum of positive squares in 3 ways, for example, as 4084441 + 12096484 = 2021^2 + 3478^2 .

It is not a de Polignac number, because 16180925 - 2⁴ = 16180909 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16180891 and 16180900.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 55079 + ... + 55371.

Almost surely, 2^16180925 is an apocalyptic number.

It is an amenable number.

16180925 is a deficient number, since it is larger than the sum of its proper divisors (4389373).

16180925 is an equidigital number, since it uses as much as digits as its factorization.

16180925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 397 (or 345 counting only the distinct ones).

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

The square root of 16180925 is about 4022.5520506266. The cubic root of 16180925 is about 252.9304489931.

The spelling of 16180925 in words is "sixteen million, one hundred eighty thousand, nine hundred twenty-five".