20123017 has 2 divisors, whose sum is σ = 20123018. Its totient is φ = 20123016.

The previous prime is 20122997. The next prime is 20123021. The reversal of 20123017 is 71032102.

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., 13512976 + 6610041 = 3676^2 + 2571^2 .

It is a cyclic number.

It is not a de Polignac number, because 20123017 - 2¹⁵ = 20090249 is a prime.

It is not a weakly prime, because it can be changed into another prime (20123057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10061508 + 10061509.

It is an arithmetic number, because the mean of its divisors is an integer number (10061509).

Almost surely, 2^20123017 is an apocalyptic number.

It is an amenable number.

20123017 is a deficient number, since it is larger than the sum of its proper divisors (1).

20123017 is an equidigital number, since it uses as much as digits as its factorization.

20123017 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 84, while the sum is 16.

The square root of 20123017 is about 4485.8685892478. The cubic root of 20123017 is about 271.9971570132.

Adding to 20123017 its reverse (71032102), we get a palindrome (91155119).

The spelling of 20123017 in words is "twenty million, one hundred twenty-three thousand, seventeen".