16321806 has 12 divisors (see below), whose sum is σ = 35363952. Its totient is φ = 5440596.

The previous prime is 16321801. The next prime is 16321807. The reversal of 16321806 is 60812361.

16321806 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×16321806² = 532802702203272, which contains 22 as substring.

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 16321806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16321801) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 453366 + ... + 453401.

It is an arithmetic number, because the mean of its divisors is an integer number (2946996).

Almost surely, 2^16321806 is an apocalyptic number.

16321806 is an abundant number, since it is smaller than the sum of its proper divisors (19042146).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16321806 is a wasteful number, since it uses less digits than its factorization.

16321806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 906775 (or 906772 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 16321806 is about 4040.0254949691. The cubic root of 16321806 is about 253.6623844342.

The spelling of 16321806 in words is "sixteen million, three hundred twenty-one thousand, eight hundred six".