16684925 has 12 divisors (see below), whose sum is σ = 20740116. Its totient is φ = 13315200.

The previous prime is 16684901. The next prime is 16684931. The reversal of 16684925 is 52948661.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 1653796 + 15031129 = 1286^2 + 3877^2 .

It is not a de Polignac number, because 16684925 - 2¹⁴ = 16668541 is a prime.

It is a hoax number, since the sum of its digits (41) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

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, 18587 + ... + 19463.

It is an arithmetic number, because the mean of its divisors is an integer number (1728343).

Almost surely, 2^16684925 is an apocalyptic number.

It is an amenable number.

16684925 is a deficient number, since it is larger than the sum of its proper divisors (4055191).

16684925 is an equidigital number, since it uses as much as digits as its factorization.

16684925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1648 (or 1643 counting only the distinct ones).

The product of its digits is 103680, while the sum is 41.

The square root of 16684925 is about 4084.7184725511. The cubic root of 16684925 is about 255.5297203106.

The spelling of 16684925 in words is "sixteen million, six hundred eighty-four thousand, nine hundred twenty-five".