18505000573 has 2 divisors, whose sum is σ = 18505000574. Its totient is φ = 18505000572.

The previous prime is 18505000537. The next prime is 18505000609. The reversal of 18505000573 is 37500050581.

Together with previous prime (18505000537) it forms an Ormiston pair, because they use the same digits, order apart.

It is a balanced prime because it is at equal distance from previous prime (18505000537) and next prime (18505000609).

It can be written as a sum of positive squares in only one way, i.e., 17844150724 + 660849849 = 133582^2 + 25707^2 .

It is a cyclic number.

It is not a de Polignac number, because 18505000573 - 2³³ = 9915065981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18505000373) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9252500286 + 9252500287.

It is an arithmetic number, because the mean of its divisors is an integer number (9252500287).

Almost surely, 2^18505000573 is an apocalyptic number.

It is an amenable number.

18505000573 is a deficient number, since it is larger than the sum of its proper divisors (1).

18505000573 is an equidigital number, since it uses as much as digits as its factorization.

18505000573 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21000, while the sum is 34.

The spelling of 18505000573 in words is "eighteen billion, five hundred five million, five hundred seventy-three", and thus it is an aban number.