16996642393 has 4 divisors (see below), whose sum is σ = 17582733540. Its totient is φ = 16410551248.

The previous prime is 16996642363. The next prime is 16996642409. The reversal of 16996642393 is 39324669961.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 39324669961 = 71 ⋅553868591.

It can be written as a sum of positive squares in 2 ways, for example, as 7724300544 + 9272341849 = 87888^2 + 96293^2 .

It is a cyclic number.

It is not a de Polignac number, because 16996642393 - 2²⁵ = 16963087961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16996642303) 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, 293045530 + ... + 293045587.

It is an arithmetic number, because the mean of its divisors is an integer number (4395683385).

Almost surely, 2^16996642393 is an apocalyptic number.

It is an amenable number.

16996642393 is a deficient number, since it is larger than the sum of its proper divisors (586091147).

16996642393 is an equidigital number, since it uses as much as digits as its factorization.

16996642393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 586091146.

The product of its digits is 11337408, while the sum is 58.

The spelling of 16996642393 in words is "sixteen billion, nine hundred ninety-six million, six hundred forty-two thousand, three hundred ninety-three".