16506830423 has 4 divisors (see below), whose sum is σ = 16540725840. Its totient is φ = 16472935008.

The previous prime is 16506830413. The next prime is 16506830429. The reversal of 16506830423 is 32403860561.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32403860561 = 139 ⋅233121299.

It is a cyclic number.

It is not a de Polignac number, because 16506830423 - 2⁴ = 16506830407 is a prime.

It is a super-2 number, since 2×16506830423² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16506830429) 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, 16946978 + ... + 16947951.

It is an arithmetic number, because the mean of its divisors is an integer number (4135181460).

Almost surely, 2^16506830423 is an apocalyptic number.

16506830423 is a deficient number, since it is larger than the sum of its proper divisors (33895417).

16506830423 is an equidigital number, since it uses as much as digits as its factorization.

16506830423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33895416.

The product of its (nonzero) digits is 103680, while the sum is 38.

The spelling of 16506830423 in words is "sixteen billion, five hundred six million, eight hundred thirty thousand, four hundred twenty-three".