21140441424323 has 4 divisors (see below), whose sum is σ = 22766629226208. Its totient is φ = 19514253622440.

The previous prime is 21140441424299. The next prime is 21140441424341. The reversal of 21140441424323 is 32342414404112.

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 21140441424323 - 2⁶ = 21140441424259 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21140441424353) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 813093900923 + ... + 813093900948.

It is an arithmetic number, because the mean of its divisors is an integer number (5691657306552).

Almost surely, 2^{21140441424323} is an apocalyptic number.

21140441424323 is a deficient number, since it is larger than the sum of its proper divisors (1626187801885).

21140441424323 is a wasteful number, since it uses less digits than its factorization.

21140441424323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1626187801884.

The product of its (nonzero) digits is 73728, while the sum is 35.

Adding to 21140441424323 its reverse (32342414404112), we get a palindrome (53482855828435).

The spelling of 21140441424323 in words is "twenty-one trillion, one hundred forty billion, four hundred forty-one million, four hundred twenty-four thousand, three hundred twenty-three".