20423255123413 has 2 divisors, whose sum is σ = 20423255123414. Its totient is φ = 20423255123412.

The previous prime is 20423255123291. The next prime is 20423255123477. The reversal of 20423255123413 is 31432155232402.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18292583582289 + 2130671541124 = 4276983^2 + 1459682^2 .

It is a cyclic number.

It is not a de Polignac number, because 20423255123413 - 2⁹ = 20423255122901 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20423255124413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10211627561706 + 10211627561707.

It is an arithmetic number, because the mean of its divisors is an integer number (10211627561707).

Almost surely, 2^{20423255123413} is an apocalyptic number.

It is an amenable number.

20423255123413 is a deficient number, since it is larger than the sum of its proper divisors (1).

20423255123413 is an equidigital number, since it uses as much as digits as its factorization.

20423255123413 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 172800, while the sum is 37.

The spelling of 20423255123413 in words is "twenty trillion, four hundred twenty-three billion, two hundred fifty-five million, one hundred twenty-three thousand, four hundred thirteen".