16805425 has 48 divisors (see below), whose sum is σ = 26248320. Its totient is φ = 10391040.

The previous prime is 16805419. The next prime is 16805429. The reversal of 16805425 is 52450861.

It is not a de Polignac number, because 16805425 - 2³ = 16805417 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16805429) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 188781 + ... + 188869.

It is an arithmetic number, because the mean of its divisors is an integer number (546840).

Almost surely, 2^16805425 is an apocalyptic number.

It is an amenable number.

16805425 is a deficient number, since it is larger than the sum of its proper divisors (9442895).

16805425 is a wasteful number, since it uses less digits than its factorization.

16805425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202 (or 197 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 31.

The square root of 16805425 is about 4099.4420352043. The cubic root of 16805425 is about 256.1433980543.

The spelling of 16805425 in words is "sixteen million, eight hundred five thousand, four hundred twenty-five".