21322503134405 has 32 divisors (see below), whose sum is σ = 29219341787136. Its totient is φ = 14795673480000.

The previous prime is 21322503134357. The next prime is 21322503134407. The reversal of 21322503134405 is 50443130522312.

It is a de Polignac number, because none of the positive numbers 2^k-21322503134405 is a prime.

It is a super-2 number, since 2×21322503134405² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21322503134407) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 87948431 + ... + 88190540.

It is an arithmetic number, because the mean of its divisors is an integer number (913104430848).

Almost surely, 2^{21322503134405} is an apocalyptic number.

It is an amenable number.

21322503134405 is a deficient number, since it is larger than the sum of its proper divisors (7896838652731).

21322503134405 is a wasteful number, since it uses less digits than its factorization.

21322503134405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176139089.

The product of its (nonzero) digits is 86400, while the sum is 35.

Adding to 21322503134405 its reverse (50443130522312), we get a palindrome (71765633656717).

The spelling of 21322503134405 in words is "twenty-one trillion, three hundred twenty-two billion, five hundred three million, one hundred thirty-four thousand, four hundred five".