20321434410431 has 32 divisors (see below), whose sum is σ = 25925953540608. Its totient is φ = 15466073495040.

The previous prime is 20321434410419. The next prime is 20321434410449. The reversal of 20321434410431 is 13401443412302.

It is not a de Polignac number, because 20321434410431 - 2³⁸ = 20046556503487 is a prime.

It is a super-2 number, since 2×20321434410431² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20321434410451) 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, 107635691 + ... + 107824323.

It is an arithmetic number, because the mean of its divisors is an integer number (810186048144).

Almost surely, 2^{20321434410431} is an apocalyptic number.

20321434410431 is a deficient number, since it is larger than the sum of its proper divisors (5604519130177).

20321434410431 is a wasteful number, since it uses less digits than its factorization.

20321434410431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221231.

The product of its (nonzero) digits is 27648, while the sum is 32.

Adding to 20321434410431 its reverse (13401443412302), we get a palindrome (33722877822733).

The spelling of 20321434410431 in words is "twenty trillion, three hundred twenty-one billion, four hundred thirty-four million, four hundred ten thousand, four hundred thirty-one".