21132324323 has 4 divisors (see below), whose sum is σ = 23053444728. Its totient is φ = 19211203920.

The previous prime is 21132324293. The next prime is 21132324349. The reversal of 21132324323 is 32342323112.

It is a happy number.

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 21132324323 - 2¹⁰ = 21132323299 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21132324292 and 21132324301.

It is not an unprimeable number, because it can be changed into a prime (21132324023) 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, 960560186 + ... + 960560207.

It is an arithmetic number, because the mean of its divisors is an integer number (5763361182).

Almost surely, 2^21132324323 is an apocalyptic number.

21132324323 is a deficient number, since it is larger than the sum of its proper divisors (1921120405).

21132324323 is a wasteful number, since it uses less digits than its factorization.

21132324323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1921120404.

The product of its digits is 5184, while the sum is 26.

Adding to 21132324323 its reverse (32342323112), we get a palindrome (53474647435).

The spelling of 21132324323 in words is "twenty-one billion, one hundred thirty-two million, three hundred twenty-four thousand, three hundred twenty-three".