21113432340403 has 16 divisors (see below), whose sum is σ = 24075813686400. Its totient is φ = 18342305796096.

The previous prime is 21113432340397. The next prime is 21113432340431. The reversal of 21113432340403 is 30404323431112.

It is a cyclic number.

It is not a de Polignac number, because 21113432340403 - 2⁹ = 21113432339891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21113432640403) 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, 5485126 + ... + 8503732.

It is an arithmetic number, because the mean of its divisors is an integer number (1504738355400).

Almost surely, 2^{21113432340403} is an apocalyptic number.

21113432340403 is a deficient number, since it is larger than the sum of its proper divisors (2962381345997).

21113432340403 is a wasteful number, since it uses less digits than its factorization.

21113432340403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3050286.

The product of its (nonzero) digits is 20736, while the sum is 31.

Adding to 21113432340403 its reverse (30404323431112), we get a palindrome (51517755771515).

The spelling of 21113432340403 in words is "twenty-one trillion, one hundred thirteen billion, four hundred thirty-two million, three hundred forty thousand, four hundred three".