20423133313123 has 2 divisors, whose sum is σ = 20423133313124. Its totient is φ = 20423133313122.

The previous prime is 20423133313087. The next prime is 20423133313153. The reversal of 20423133313123 is 32131333132402.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20423133313123 is a prime.

It is not a weakly prime, because it can be changed into another prime (20423133313153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10211566656561 + 10211566656562.

It is an arithmetic number, because the mean of its divisors is an integer number (10211566656562).

Almost surely, 2^{20423133313123} is an apocalyptic number.

20423133313123 is a deficient number, since it is larger than the sum of its proper divisors (1).

20423133313123 is an equidigital number, since it uses as much as digits as its factorization.

20423133313123 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23328, while the sum is 31.

Adding to 20423133313123 its reverse (32131333132402), we get a palindrome (52554466445525).

The spelling of 20423133313123 in words is "twenty trillion, four hundred twenty-three billion, one hundred thirty-three million, three hundred thirteen thousand, one hundred twenty-three".