18493272001 has 2 divisors, whose sum is σ = 18493272002. Its totient is φ = 18493272000.

The previous prime is 18493271981. The next prime is 18493272011. The reversal of 18493272001 is 10027239481.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9667608976 + 8825663025 = 98324^2 + 93945^2 .

It is a cyclic number.

It is not a de Polignac number, because 18493272001 - 2⁷ = 18493271873 is a prime.

It is a super-2 number, since 2×18493272001² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (18493272011) 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, 9246636000 + 9246636001.

It is an arithmetic number, because the mean of its divisors is an integer number (9246636001).

Almost surely, 2^18493272001 is an apocalyptic number.

It is an amenable number.

18493272001 is a deficient number, since it is larger than the sum of its proper divisors (1).

18493272001 is an equidigital number, since it uses as much as digits as its factorization.

18493272001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24192, while the sum is 37.

The spelling of 18493272001 in words is "eighteen billion, four hundred ninety-three million, two hundred seventy-two thousand, one".