203323118017 has 2 divisors, whose sum is σ = 203323118018. Its totient is φ = 203323118016.

The previous prime is 203323117969. The next prime is 203323118027. The reversal of 203323118017 is 710811323302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 195186356401 + 8136761616 = 441799^2 + 90204^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-203323118017 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 203323118017.

It is not a weakly prime, because it can be changed into another prime (203323118027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101661559008 + 101661559009.

It is an arithmetic number, because the mean of its divisors is an integer number (101661559009).

Almost surely, 2^203323118017 is an apocalyptic number.

It is an amenable number.

203323118017 is a deficient number, since it is larger than the sum of its proper divisors (1).

203323118017 is an equidigital number, since it uses as much as digits as its factorization.

203323118017 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6048, while the sum is 31.

The spelling of 203323118017 in words is "two hundred three billion, three hundred twenty-three million, one hundred eighteen thousand, seventeen".