18530167121 has 2 divisors, whose sum is σ = 18530167122. Its totient is φ = 18530167120.

The previous prime is 18530167109. The next prime is 18530167129. The reversal of 18530167121 is 12176103581.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14027086096 + 4503081025 = 118436^2 + 67105^2 .

It is a cyclic number.

It is not a de Polignac number, because 18530167121 - 2⁶ = 18530167057 is a prime.

It is not a weakly prime, because it can be changed into another prime (18530167129) 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, 9265083560 + 9265083561.

It is an arithmetic number, because the mean of its divisors is an integer number (9265083561).

Almost surely, 2^18530167121 is an apocalyptic number.

It is an amenable number.

18530167121 is a deficient number, since it is larger than the sum of its proper divisors (1).

18530167121 is an equidigital number, since it uses as much as digits as its factorization.

18530167121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10080, while the sum is 35.

The spelling of 18530167121 in words is "eighteen billion, five hundred thirty million, one hundred sixty-seven thousand, one hundred twenty-one".