16805043 has 16 divisors (see below), whose sum is σ = 25052160. Its totient is φ = 11133288.

The previous prime is 16805023. The next prime is 16805053. The reversal of 16805043 is 34050861.

It is not a de Polignac number, because 16805043 - 2⁵ = 16805011 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 16804998 and 16805016.

It is not an unprimeable number, because it can be changed into a prime (16805003) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2646 + ... + 6372.

It is an arithmetic number, because the mean of its divisors is an integer number (1565760).

Almost surely, 2^16805043 is an apocalyptic number.

16805043 is a deficient number, since it is larger than the sum of its proper divisors (8247117).

16805043 is a wasteful number, since it uses less digits than its factorization.

16805043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3903 (or 3897 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 16805043 is about 4099.3954432331. The cubic root of 16805043 is about 256.1414572620.

The spelling of 16805043 in words is "sixteen million, eight hundred five thousand, forty-three".