16804013 has 4 divisors (see below), whose sum is σ = 17194848. Its totient is φ = 16413180.

The previous prime is 16804003. The next prime is 16804019. The reversal of 16804013 is 31040861.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 31040861 = 17 ⋅1825933.

It is a cyclic number.

It is not a de Polignac number, because 16804013 - 2⁶ = 16803949 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 16804013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16804019) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 195353 + ... + 195438.

It is an arithmetic number, because the mean of its divisors is an integer number (4298712).

Almost surely, 2^16804013 is an apocalyptic number.

It is an amenable number.

16804013 is a deficient number, since it is larger than the sum of its proper divisors (390835).

16804013 is an equidigital number, since it uses as much as digits as its factorization.

16804013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 390834.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 16804013 is about 4099.2698130277. The cubic root of 16804013 is about 256.1362240890.

Adding to 16804013 its reverse (31040861), we get a palindrome (47844874).

The spelling of 16804013 in words is "sixteen million, eight hundred four thousand, thirteen".