16684321323 has 4 divisors (see below), whose sum is σ = 22245761768. Its totient is φ = 11122880880.

The previous prime is 16684321229. The next prime is 16684321327. The reversal of 16684321323 is 32312348661.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32312348661 = 3 ⋅10770782887.

It is not a de Polignac number, because 16684321323 - 2¹³ = 16684313131 is a prime.

It is a super-2 number, since 2×16684321323² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16684321327) 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, 2780720218 + ... + 2780720223.

It is an arithmetic number, because the mean of its divisors is an integer number (5561440442).

Almost surely, 2^16684321323 is an apocalyptic number.

16684321323 is a deficient number, since it is larger than the sum of its proper divisors (5561440445).

16684321323 is an equidigital number, since it uses as much as digits as its factorization.

16684321323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5561440444.

The product of its digits is 124416, while the sum is 39.

Adding to 16684321323 its reverse (32312348661), we get a palindrome (48996669984).

The spelling of 16684321323 in words is "sixteen billion, six hundred eighty-four million, three hundred twenty-one thousand, three hundred twenty-three".