16642804 has 12 divisors (see below), whose sum is σ = 29253700. Its totient is φ = 8284608.

The previous prime is 16642799. The next prime is 16642819. The reversal of 16642804 is 40824661.

It can be written as a sum of positive squares in 2 ways, for example, as 9363600 + 7279204 = 3060^2 + 2698^2 .

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 3 ways as a sum of consecutive naturals, for example, 8169 + ... + 10000.

Almost surely, 2^16642804 is an apocalyptic number.

It is an amenable number.

16642804 is a deficient number, since it is larger than the sum of its proper divisors (12610896).

16642804 is a wasteful number, since it uses less digits than its factorization.

16642804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18402 (or 18400 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 31.

The square root of 16642804 is about 4079.5592899234. The cubic root of 16642804 is about 255.3145113269.

The spelling of 16642804 in words is "sixteen million, six hundred forty-two thousand, eight hundred four".