21320044323 has 8 divisors (see below), whose sum is σ = 28465195200. Its totient is φ = 14194128168.

The previous prime is 21320044309. The next prime is 21320044331. The reversal of 21320044323 is 32344002312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21320044323 - 2¹⁰ = 21320043299 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21320044293 and 21320044302.

It is not an unprimeable number, because it can be changed into a prime (21320045323) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4806093 + ... + 4810526.

It is an arithmetic number, because the mean of its divisors is an integer number (3558149400).

Almost surely, 2^21320044323 is an apocalyptic number.

21320044323 is a deficient number, since it is larger than the sum of its proper divisors (7145150877).

21320044323 is an equidigital number, since it uses as much as digits as its factorization.

21320044323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9617361.

The product of its (nonzero) digits is 3456, while the sum is 24.

Adding to 21320044323 its reverse (32344002312), we get a palindrome (53664046635).

The spelling of 21320044323 in words is "twenty-one billion, three hundred twenty million, forty-four thousand, three hundred twenty-three".