16321831873 has 4 divisors (see below), whose sum is σ = 16326510768. Its totient is φ = 16317152980.

The previous prime is 16321831871. The next prime is 16321831907. The reversal of 16321831873 is 37813812361.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 16321831873 - 2¹ = 16321831871 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16321831871) 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 in 3 ways as a sum of consecutive naturals, for example, 2334211 + ... + 2341192.

It is an arithmetic number, because the mean of its divisors is an integer number (4081627692).

Almost surely, 2^16321831873 is an apocalyptic number.

It is an amenable number.

16321831873 is a deficient number, since it is larger than the sum of its proper divisors (4678895).

16321831873 is an equidigital number, since it uses as much as digits as its factorization.

16321831873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4678894.

The product of its digits is 145152, while the sum is 43.

The spelling of 16321831873 in words is "sixteen billion, three hundred twenty-one million, eight hundred thirty-one thousand, eight hundred seventy-three".