21243014323 has 16 divisors (see below), whose sum is σ = 21779041536. Its totient is φ = 20712313440.

The previous prime is 21243014297. The next prime is 21243014339. The reversal of 21243014323 is 32341034212.

It is a cyclic number.

It is not a de Polignac number, because 21243014323 - 2²⁹ = 20706143411 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21243014623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11886636 + ... + 11888422.

It is an arithmetic number, because the mean of its divisors is an integer number (1361190096).

Almost surely, 2^21243014323 is an apocalyptic number.

21243014323 is a deficient number, since it is larger than the sum of its proper divisors (536027213).

21243014323 is a wasteful number, since it uses less digits than its factorization.

21243014323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3114.

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 21243014323 its reverse (32341034212), we get a palindrome (53584048535).

The spelling of 21243014323 in words is "twenty-one billion, two hundred forty-three million, fourteen thousand, three hundred twenty-three".