20315334521431 has 2 divisors, whose sum is σ = 20315334521432. Its totient is φ = 20315334521430.

The previous prime is 20315334521413. The next prime is 20315334521467. The reversal of 20315334521431 is 13412543351302.

It is a happy number.

Together with previous prime (20315334521413) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20315334521431 - 2⁵ = 20315334521399 is a prime.

It is a super-2 number, since 2×20315334521431² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20315334521731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10157667260715 + 10157667260716.

It is an arithmetic number, because the mean of its divisors is an integer number (10157667260716).

Almost surely, 2^{20315334521431} is an apocalyptic number.

20315334521431 is a deficient number, since it is larger than the sum of its proper divisors (1).

20315334521431 is an equidigital number, since it uses as much as digits as its factorization.

20315334521431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 129600, while the sum is 37.

Adding to 20315334521431 its reverse (13412543351302), we get a palindrome (33727877872733).

The spelling of 20315334521431 in words is "twenty trillion, three hundred fifteen billion, three hundred thirty-four million, five hundred twenty-one thousand, four hundred thirty-one".