18327227473 has 2 divisors, whose sum is σ = 18327227474. Its totient is φ = 18327227472.

The previous prime is 18327227453. The next prime is 18327227531. The reversal of 18327227473 is 37472272381.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13324777489 + 5002449984 = 115433^2 + 70728^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18327227473 is a prime.

It is not a weakly prime, because it can be changed into another prime (18327227453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9163613736 + 9163613737.

It is an arithmetic number, because the mean of its divisors is an integer number (9163613737).

Almost surely, 2^18327227473 is an apocalyptic number.

It is an amenable number.

18327227473 is a deficient number, since it is larger than the sum of its proper divisors (1).

18327227473 is an equidigital number, since it uses as much as digits as its factorization.

18327227473 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 790272, while the sum is 46.

The spelling of 18327227473 in words is "eighteen billion, three hundred twenty-seven million, two hundred twenty-seven thousand, four hundred seventy-three".