20112321403423 has 2 divisors, whose sum is σ = 20112321403424. Its totient is φ = 20112321403422.

The previous prime is 20112321403403. The next prime is 20112321403487. The reversal of 20112321403423 is 32430412321102.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20112321403423 is a prime.

It is a super-2 number, since 2×20112321403423² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20112321403391 and 20112321403400.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20112321403403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10056160701711 + 10056160701712.

It is an arithmetic number, because the mean of its divisors is an integer number (10056160701712).

Almost surely, 2^{20112321403423} is an apocalyptic number.

20112321403423 is a deficient number, since it is larger than the sum of its proper divisors (1).

20112321403423 is an equidigital number, since it uses as much as digits as its factorization.

20112321403423 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6912, while the sum is 28.

Adding to 20112321403423 its reverse (32430412321102), we get a palindrome (52542733724525).

The spelling of 20112321403423 in words is "twenty trillion, one hundred twelve billion, three hundred twenty-one million, four hundred three thousand, four hundred twenty-three".