18202002001 has 2 divisors, whose sum is σ = 18202002002. Its totient is φ = 18202002000.

The previous prime is 18202001971. The next prime is 18202002011. The reversal of 18202002001 is 10020020281.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17969134401 + 232867600 = 134049^2 + 15260^2 .

It is a cyclic number.

It is not a de Polignac number, because 18202002001 - 2⁵ = 18202001969 is a prime.

It is not a weakly prime, because it can be changed into another prime (18202002011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9101001000 + 9101001001.

It is an arithmetic number, because the mean of its divisors is an integer number (9101001001).

Almost surely, 2^18202002001 is an apocalyptic number.

It is an amenable number.

18202002001 is a deficient number, since it is larger than the sum of its proper divisors (1).

18202002001 is an equidigital number, since it uses as much as digits as its factorization.

18202002001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 18202002001 its reverse (10020020281), we get a palindrome (28222022282).

The spelling of 18202002001 in words is "eighteen billion, two hundred two million, two thousand, one".