16918323473 has 2 divisors, whose sum is σ = 16918323474. Its totient is φ = 16918323472.

The previous prime is 16918323467. The next prime is 16918323479. The reversal of 16918323473 is 37432381961.

It is a balanced prime because it is at equal distance from previous prime (16918323467) and next prime (16918323479).

It can be written as a sum of positive squares in only one way, i.e., 12033431809 + 4884891664 = 109697^2 + 69892^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16918323473 is a prime.

It is not a weakly prime, because it can be changed into another prime (16918323479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8459161736 + 8459161737.

It is an arithmetic number, because the mean of its divisors is an integer number (8459161737).

Almost surely, 2^16918323473 is an apocalyptic number.

It is an amenable number.

16918323473 is a deficient number, since it is larger than the sum of its proper divisors (1).

16918323473 is an equidigital number, since it uses as much as digits as its factorization.

16918323473 is an evil number, because the sum of its binary digits is even.

The product of its digits is 653184, while the sum is 47.

The spelling of 16918323473 in words is "sixteen billion, nine hundred eighteen million, three hundred twenty-three thousand, four hundred seventy-three".