20423144132393 has 2 divisors, whose sum is σ = 20423144132394. Its totient is φ = 20423144132392.

The previous prime is 20423144132297. The next prime is 20423144132411. The reversal of 20423144132393 is 39323144132402.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11907999935209 + 8515144197184 = 3450797^2 + 2918072^2 .

It is a cyclic number.

It is not a de Polignac number, because 20423144132393 - 2³² = 20418849165097 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 20423144132393.

It is not a weakly prime, because it can be changed into another prime (20423144132093) 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, 10211572066196 + 10211572066197.

It is an arithmetic number, because the mean of its divisors is an integer number (10211572066197).

Almost surely, 2^{20423144132393} is an apocalyptic number.

It is an amenable number.

20423144132393 is a deficient number, since it is larger than the sum of its proper divisors (1).

20423144132393 is an equidigital number, since it uses as much as digits as its factorization.

20423144132393 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 373248, while the sum is 41.

Adding to 20423144132393 its reverse (39323144132402), we get a palindrome (59746288264795).

The spelling of 20423144132393 in words is "twenty trillion, four hundred twenty-three billion, one hundred forty-four million, one hundred thirty-two thousand, three hundred ninety-three".