20201323117 has 2 divisors, whose sum is σ = 20201323118. Its totient is φ = 20201323116.

The previous prime is 20201323097. The next prime is 20201323171. The reversal of 20201323117 is 71132310202.

It is a happy number.

Together with next prime (20201323171) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14469924681 + 5731398436 = 120291^2 + 75706^2 .

It is a cyclic number.

It is not a de Polignac number, because 20201323117 - 2¹⁹ = 20200798829 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20201323217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10100661558 + 10100661559.

It is an arithmetic number, because the mean of its divisors is an integer number (10100661559).

Almost surely, 2^20201323117 is an apocalyptic number.

It is an amenable number.

20201323117 is a deficient number, since it is larger than the sum of its proper divisors (1).

20201323117 is an equidigital number, since it uses as much as digits as its factorization.

20201323117 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 504, while the sum is 22.

Adding to 20201323117 its reverse (71132310202), we get a palindrome (91333633319).

The spelling of 20201323117 in words is "twenty billion, two hundred one million, three hundred twenty-three thousand, one hundred seventeen".