20431534514231 has 2 divisors, whose sum is σ = 20431534514232. Its totient is φ = 20431534514230.

The previous prime is 20431534514207. The next prime is 20431534514273. The reversal of 20431534514231 is 13241543513402.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20431534514231 is a prime.

It is a super-2 number, since 2×20431534514231² (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 (20431534514201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10215767257115 + 10215767257116.

It is an arithmetic number, because the mean of its divisors is an integer number (10215767257116).

Almost surely, 2^{20431534514231} is an apocalyptic number.

20431534514231 is a deficient number, since it is larger than the sum of its proper divisors (1).

20431534514231 is an equidigital number, since it uses as much as digits as its factorization.

20431534514231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 172800, while the sum is 38.

The spelling of 20431534514231 in words is "twenty trillion, four hundred thirty-one billion, five hundred thirty-four million, five hundred fourteen thousand, two hundred thirty-one".