16328813 has 4 divisors (see below), whose sum is σ = 16349340. Its totient is φ = 16308288.

The previous prime is 16328801. The next prime is 16328833. The reversal of 16328813 is 31882361.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5484964 + 10843849 = 2342^2 + 3293^2 .

It is a cyclic number.

It is not a de Polignac number, because 16328813 - 2⁶ = 16328749 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 16328813.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16328833) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9020 + ... + 10677.

It is an arithmetic number, because the mean of its divisors is an integer number (4087335).

Almost surely, 2^16328813 is an apocalyptic number.

It is an amenable number.

16328813 is a deficient number, since it is larger than the sum of its proper divisors (20527).

16328813 is an equidigital number, since it uses as much as digits as its factorization.

16328813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20526.

The product of its digits is 6912, while the sum is 32.

The square root of 16328813 is about 4040.8925994141. The cubic root of 16328813 is about 253.6986785804.

The spelling of 16328813 in words is "sixteen million, three hundred twenty-eight thousand, eight hundred thirteen".