20431242151 has 2 divisors, whose sum is σ = 20431242152. Its totient is φ = 20431242150.

The previous prime is 20431242119. The next prime is 20431242163. The reversal of 20431242151 is 15124213402.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20431242151 - 2⁵ = 20431242119 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20431242451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10215621075 + 10215621076.

It is an arithmetic number, because the mean of its divisors is an integer number (10215621076).

Almost surely, 2^20431242151 is an apocalyptic number.

20431242151 is a deficient number, since it is larger than the sum of its proper divisors (1).

20431242151 is an equidigital number, since it uses as much as digits as its factorization.

20431242151 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1920, while the sum is 25.

Adding to 20431242151 its reverse (15124213402), we get a palindrome (35555455553).

The spelling of 20431242151 in words is "twenty billion, four hundred thirty-one million, two hundred forty-two thousand, one hundred fifty-one".