21432344323413 has 16 divisors (see below), whose sum is σ = 28640580742656. Its totient is φ = 14256190406640.

The previous prime is 21432344323399. The next prime is 21432344323421. The reversal of 21432344323413 is 31432344323412.

It is not a de Polignac number, because 21432344323413 - 2⁵ = 21432344323381 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21432344323483) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1247920 + ... + 6664982.

It is an arithmetic number, because the mean of its divisors is an integer number (1790036296416).

Almost surely, 2^{21432344323413} is an apocalyptic number.

It is an amenable number.

21432344323413 is a deficient number, since it is larger than the sum of its proper divisors (7208236419243).

21432344323413 is a wasteful number, since it uses less digits than its factorization.

21432344323413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5420024.

The product of its digits is 497664, while the sum is 39.

Adding to 21432344323413 its reverse (31432344323412), we get a palindrome (52864688646825).

Subtracting 21432344323413 from its reverse (31432344323412), we obtain a palindrome (9999999999999).

The spelling of 21432344323413 in words is "twenty-one trillion, four hundred thirty-two billion, three hundred forty-four million, three hundred twenty-three thousand, four hundred thirteen".