16823716321 has 32 divisors (see below), whose sum is σ = 18478264320. Its totient is φ = 15267067200.

The previous prime is 16823716319. The next prime is 16823716333. The reversal of 16823716321 is 12361732861.

It is a cyclic number.

It is not a de Polignac number, because 16823716321 - 2¹ = 16823716319 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16823716381) 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, 26661676 + ... + 26662306.

It is an arithmetic number, because the mean of its divisors is an integer number (577445760).

Almost surely, 2^16823716321 is an apocalyptic number.

It is an amenable number.

16823716321 is a deficient number, since it is larger than the sum of its proper divisors (1654547999).

16823716321 is a wasteful number, since it uses less digits than its factorization.

16823716321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1317.

The product of its digits is 72576, while the sum is 40.

The spelling of 16823716321 in words is "sixteen billion, eight hundred twenty-three million, seven hundred sixteen thousand, three hundred twenty-one".