14384315821 has 4 divisors (see below), whose sum is σ = 14390329212. Its totient is φ = 14378302432.

The previous prime is 14384315779. The next prime is 14384315833. The reversal of 14384315821 is 12851348341.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3802078921 + 10582236900 = 61661^2 + 102870^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-14384315821 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (14384315861) 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, 3003106 + ... + 3007891.

It is an arithmetic number, because the mean of its divisors is an integer number (3597582303).

Almost surely, 2^14384315821 is an apocalyptic number.

It is an amenable number.

14384315821 is a deficient number, since it is larger than the sum of its proper divisors (6013391).

14384315821 is an equidigital number, since it uses as much as digits as its factorization.

14384315821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6013390.

The product of its digits is 92160, while the sum is 40.

The spelling of 14384315821 in words is "fourteen billion, three hundred eighty-four million, three hundred fifteen thousand, eight hundred twenty-one".