20431175143 has 2 divisors, whose sum is σ = 20431175144. Its totient is φ = 20431175142.

The previous prime is 20431175129. The next prime is 20431175173. The reversal of 20431175143 is 34157113402.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20431175143 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20431175173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10215587571 + 10215587572.

It is an arithmetic number, because the mean of its divisors is an integer number (10215587572).

Almost surely, 2^20431175143 is an apocalyptic number.

20431175143 is a deficient number, since it is larger than the sum of its proper divisors (1).

20431175143 is an equidigital number, since it uses as much as digits as its factorization.

20431175143 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10080, while the sum is 31.

Adding to 20431175143 its reverse (34157113402), we get a palindrome (54588288545).

The spelling of 20431175143 in words is "twenty billion, four hundred thirty-one million, one hundred seventy-five thousand, one hundred forty-three".