20431052423 has 2 divisors, whose sum is σ = 20431052424. Its totient is φ = 20431052422.

The previous prime is 20431052413. The next prime is 20431052429. The reversal of 20431052423 is 32425013402.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20431052423 - 2⁴ = 20431052407 is a prime.

It is a super-2 number, since 2×20431052423² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20431052392 and 20431052401.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20431052429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10215526211 + 10215526212.

It is an arithmetic number, because the mean of its divisors is an integer number (10215526212).

Almost surely, 2^20431052423 is an apocalyptic number.

20431052423 is a deficient number, since it is larger than the sum of its proper divisors (1).

20431052423 is an equidigital number, since it uses as much as digits as its factorization.

20431052423 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5760, while the sum is 26.

Adding to 20431052423 its reverse (32425013402), we get a palindrome (52856065825).

The spelling of 20431052423 in words is "twenty billion, four hundred thirty-one million, fifty-two thousand, four hundred twenty-three".