16971821323 has 2 divisors, whose sum is σ = 16971821324. Its totient is φ = 16971821322.

The previous prime is 16971821311. The next prime is 16971821329. The reversal of 16971821323 is 32312817961.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 16971821323 - 2¹⁷ = 16971690251 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16971821323.

It is not a weakly prime, because it can be changed into another prime (16971821329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8485910661 + 8485910662.

It is an arithmetic number, because the mean of its divisors is an integer number (8485910662).

Almost surely, 2^16971821323 is an apocalyptic number.

16971821323 is a deficient number, since it is larger than the sum of its proper divisors (1).

16971821323 is an equidigital number, since it uses as much as digits as its factorization.

16971821323 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 108864, while the sum is 43.

The spelling of 16971821323 in words is "sixteen billion, nine hundred seventy-one million, eight hundred twenty-one thousand, three hundred twenty-three".