21343444323 has 8 divisors (see below), whose sum is σ = 28460299536. Its totient is φ = 14227776000.

The previous prime is 21343444303. The next prime is 21343444351. The reversal of 21343444323 is 32344434312.

It is a happy number.

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

It is not a de Polignac number, because 21343444323 - 2¹² = 21343440227 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21343444303) 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, 253878 + ... + 327323.

It is an arithmetic number, because the mean of its divisors is an integer number (3557537442).

Almost surely, 2^21343444323 is an apocalyptic number.

21343444323 is a deficient number, since it is larger than the sum of its proper divisors (7116855213).

21343444323 is a wasteful number, since it uses less digits than its factorization.

21343444323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 593445.

The product of its digits is 82944, while the sum is 33.

Adding to 21343444323 its reverse (32344434312), we get a palindrome (53687878635).

The spelling of 21343444323 in words is "twenty-one billion, three hundred forty-three million, four hundred forty-four thousand, three hundred twenty-three".