16594129421 has 4 divisors (see below), whose sum is σ = 16601451552. Its totient is φ = 16586807292.

The previous prime is 16594129399. The next prime is 16594129423. The reversal of 16594129421 is 12492149561.

16594129421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 16594129421 - 2²⁶ = 16527020557 is a prime.

It is a super-3 number, since 3×16594129421³ (a number of 32 digits) contains 333 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 (16594129423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3657665 + ... + 3662198.

It is an arithmetic number, because the mean of its divisors is an integer number (4150362888).

Almost surely, 2^16594129421 is an apocalyptic number.

It is an amenable number.

16594129421 is a deficient number, since it is larger than the sum of its proper divisors (7322131).

16594129421 is an equidigital number, since it uses as much as digits as its factorization.

16594129421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7322130.

The product of its digits is 155520, while the sum is 44.

The spelling of 16594129421 in words is "sixteen billion, five hundred ninety-four million, one hundred twenty-nine thousand, four hundred twenty-one".