18066284437 has 2 divisors, whose sum is σ = 18066284438. Its totient is φ = 18066284436.

The previous prime is 18066284413. The next prime is 18066284441. The reversal of 18066284437 is 73448266081.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9902439121 + 8163845316 = 99511^2 + 90354^2 .

It is a cyclic number.

It is not a de Polignac number, because 18066284437 - 2¹⁹ = 18065760149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18066284497) 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, 9033142218 + 9033142219.

It is an arithmetic number, because the mean of its divisors is an integer number (9033142219).

Almost surely, 2^18066284437 is an apocalyptic number.

It is an amenable number.

18066284437 is a deficient number, since it is larger than the sum of its proper divisors (1).

18066284437 is an equidigital number, since it uses as much as digits as its factorization.

18066284437 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1548288, while the sum is 49.

The spelling of 18066284437 in words is "eighteen billion, sixty-six million, two hundred eighty-four thousand, four hundred thirty-seven".