18528982993 has 2 divisors, whose sum is σ = 18528982994. Its totient is φ = 18528982992.

The previous prime is 18528982957. The next prime is 18528983023. The reversal of 18528982993 is 39928982581.

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., 16529730624 + 1999252369 = 128568^2 + 44713^2 .

It is a cyclic number.

It is not a de Polignac number, because 18528982993 - 2⁹ = 18528982481 is a prime.

It is not a weakly prime, because it can be changed into another prime (18528982943) 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, 9264491496 + 9264491497.

It is an arithmetic number, because the mean of its divisors is an integer number (9264491497).

Almost surely, 2^18528982993 is an apocalyptic number.

It is an amenable number.

18528982993 is a deficient number, since it is larger than the sum of its proper divisors (1).

18528982993 is an equidigital number, since it uses as much as digits as its factorization.

18528982993 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 22394880, while the sum is 64.

The spelling of 18528982993 in words is "eighteen billion, five hundred twenty-eight million, nine hundred eighty-two thousand, nine hundred ninety-three".