21340443130323 has 16 divisors (see below), whose sum is σ = 28714505436672. Its totient is φ = 14097000060000.

The previous prime is 21340443130313. The next prime is 21340443130343. The reversal of 21340443130323 is 32303134404312.

It is a happy number.

It is not a de Polignac number, because 21340443130323 - 2⁸ = 21340443130067 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21340443130313) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40815403 + ... + 41334948.

It is an arithmetic number, because the mean of its divisors is an integer number (1794656589792).

Almost surely, 2^{21340443130323} is an apocalyptic number.

21340443130323 is a deficient number, since it is larger than the sum of its proper divisors (7374062306349).

21340443130323 is a wasteful number, since it uses less digits than its factorization.

21340443130323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82151146.

The product of its (nonzero) digits is 62208, while the sum is 33.

Adding to 21340443130323 its reverse (32303134404312), we get a palindrome (53643577534635).

The spelling of 21340443130323 in words is "twenty-one trillion, three hundred forty billion, four hundred forty-three million, one hundred thirty thousand, three hundred twenty-three".