20502341423 has 2 divisors, whose sum is σ = 20502341424. Its totient is φ = 20502341422.

The previous prime is 20502341407. The next prime is 20502341437. The reversal of 20502341423 is 32414320502.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20502341423 - 2⁴ = 20502341407 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 20502341392 and 20502341401.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20502341623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10251170711 + 10251170712.

It is an arithmetic number, because the mean of its divisors is an integer number (10251170712).

Almost surely, 2^20502341423 is an apocalyptic number.

20502341423 is a deficient number, since it is larger than the sum of its proper divisors (1).

20502341423 is an equidigital number, since it uses as much as digits as its factorization.

20502341423 is an odious number, because the sum of its binary digits is odd.

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

Adding to 20502341423 its reverse (32414320502), we get a palindrome (52916661925).

The spelling of 20502341423 in words is "twenty billion, five hundred two million, three hundred forty-one thousand, four hundred twenty-three".