18386722001 has 2 divisors, whose sum is σ = 18386722002. Its totient is φ = 18386722000.

The previous prime is 18386721929. The next prime is 18386722019. The reversal of 18386722001 is 10022768381.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17207142976 + 1179579025 = 131176^2 + 34345^2 .

It is a cyclic number.

It is not a de Polignac number, because 18386722001 - 2¹⁰ = 18386720977 is a prime.

It is not a weakly prime, because it can be changed into another prime (18386722801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9193361000 + 9193361001.

It is an arithmetic number, because the mean of its divisors is an integer number (9193361001).

Almost surely, 2^18386722001 is an apocalyptic number.

It is an amenable number.

18386722001 is a deficient number, since it is larger than the sum of its proper divisors (1).

18386722001 is an equidigital number, since it uses as much as digits as its factorization.

18386722001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32256, while the sum is 38.

The spelling of 18386722001 in words is "eighteen billion, three hundred eighty-six million, seven hundred twenty-two thousand, one".