16806972903 has 32 divisors (see below), whose sum is σ = 26147520000. Its totient is φ = 9598756608.

The previous prime is 16806972883. The next prime is 16806972911. The reversal of 16806972903 is 30927960861.

It is not a de Polignac number, because 16806972903 - 2¹⁸ = 16806710759 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16806972953) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2665048 + ... + 2671346.

It is an arithmetic number, because the mean of its divisors is an integer number (817110000).

Almost surely, 2^16806972903 is an apocalyptic number.

16806972903 is a deficient number, since it is larger than the sum of its proper divisors (9340547097).

16806972903 is an equidigital number, since it uses as much as digits as its factorization.

16806972903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8916 (or 8902 counting only the distinct ones).

The product of its (nonzero) digits is 979776, while the sum is 51.

The spelling of 16806972903 in words is "sixteen billion, eight hundred six million, nine hundred seventy-two thousand, nine hundred three".