21342032323 has 4 divisors (see below), whose sum is σ = 21342776760. Its totient is φ = 21341287888.

The previous prime is 21342032317. The next prime is 21342032347. The reversal of 21342032323 is 32323024312.

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

It is a cyclic number.

It is not a de Polignac number, because 21342032323 - 2²⁵ = 21308477891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21342032353) 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, 327418 + ... + 387151.

It is an arithmetic number, because the mean of its divisors is an integer number (5335694190).

Almost surely, 2^21342032323 is an apocalyptic number.

21342032323 is a deficient number, since it is larger than the sum of its proper divisors (744437).

21342032323 is an equidigital number, since it uses as much as digits as its factorization.

21342032323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 744436.

The product of its (nonzero) digits is 5184, while the sum is 25.

Adding to 21342032323 its reverse (32323024312), we get a palindrome (53665056635).

The spelling of 21342032323 in words is "twenty-one billion, three hundred forty-two million, thirty-two thousand, three hundred twenty-three".