16944043971 has 4 divisors (see below), whose sum is σ = 22592058632. Its totient is φ = 11296029312.

The previous prime is 16944043969. The next prime is 16944044021. The reversal of 16944043971 is 17934044961.

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

It is not a de Polignac number, because 16944043971 - 2¹ = 16944043969 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 16944043971.

It is not an unprimeable number, because it can be changed into a prime (16944043471) 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, 2824007326 + ... + 2824007331.

It is an arithmetic number, because the mean of its divisors is an integer number (5648014658).

Almost surely, 2^16944043971 is an apocalyptic number.

16944043971 is a deficient number, since it is larger than the sum of its proper divisors (5648014661).

16944043971 is an equidigital number, since it uses as much as digits as its factorization.

16944043971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5648014660.

The product of its (nonzero) digits is 653184, while the sum is 48.

The spelling of 16944043971 in words is "sixteen billion, nine hundred forty-four million, forty-three thousand, nine hundred seventy-one".