18316950073 has 2 divisors, whose sum is σ = 18316950074. Its totient is φ = 18316950072.

The previous prime is 18316950023. The next prime is 18316950077. The reversal of 18316950073 is 37005961381.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16479370384 + 1837579689 = 128372^2 + 42867^2 .

It is a cyclic number.

It is not a de Polignac number, because 18316950073 - 2⁹ = 18316949561 is a prime.

It is not a weakly prime, because it can be changed into another prime (18316950077) 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, 9158475036 + 9158475037.

It is an arithmetic number, because the mean of its divisors is an integer number (9158475037).

Almost surely, 2^18316950073 is an apocalyptic number.

It is an amenable number.

18316950073 is a deficient number, since it is larger than the sum of its proper divisors (1).

18316950073 is an equidigital number, since it uses as much as digits as its factorization.

18316950073 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 136080, while the sum is 43.

The spelling of 18316950073 in words is "eighteen billion, three hundred sixteen million, nine hundred fifty thousand, seventy-three".