20423011117 has 2 divisors, whose sum is σ = 20423011118. Its totient is φ = 20423011116.

The previous prime is 20423011073. The next prime is 20423011153. The reversal of 20423011117 is 71111032402.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18754206916 + 1668804201 = 136946^2 + 40851^2 .

It is a cyclic number.

It is not a de Polignac number, because 20423011117 - 2⁷ = 20423010989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20423011157) 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, 10211505558 + 10211505559.

It is an arithmetic number, because the mean of its divisors is an integer number (10211505559).

Almost surely, 2^20423011117 is an apocalyptic number.

It is an amenable number.

20423011117 is a deficient number, since it is larger than the sum of its proper divisors (1).

20423011117 is an equidigital number, since it uses as much as digits as its factorization.

20423011117 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 336, while the sum is 22.

Adding to 20423011117 its reverse (71111032402), we get a palindrome (91534043519).

The spelling of 20423011117 in words is "twenty billion, four hundred twenty-three million, eleven thousand, one hundred seventeen".