18500085001 has 2 divisors, whose sum is σ = 18500085002. Its totient is φ = 18500085000.

The previous prime is 18500084921. The next prime is 18500085061. The reversal of 18500085001 is 10058000581.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12757476601 + 5742608400 = 112949^2 + 75780^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18500085001 is a prime.

It is not a weakly prime, because it can be changed into another prime (18500085061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9250042500 + 9250042501.

It is an arithmetic number, because the mean of its divisors is an integer number (9250042501).

Almost surely, 2^18500085001 is an apocalyptic number.

It is an amenable number.

18500085001 is a deficient number, since it is larger than the sum of its proper divisors (1).

18500085001 is an equidigital number, since it uses as much as digits as its factorization.

18500085001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1600, while the sum is 28.

Adding to 18500085001 its reverse (10058000581), we get a palindrome (28558085582).

The spelling of 18500085001 in words is "eighteen billion, five hundred million, eighty-five thousand, one".