18732263189 has 2 divisors, whose sum is σ = 18732263190. Its totient is φ = 18732263188.

The previous prime is 18732263167. The next prime is 18732263213. The reversal of 18732263189 is 98136223781.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15836208964 + 2896054225 = 125842^2 + 53815^2 .

It is a cyclic number.

It is not a de Polignac number, because 18732263189 - 2²⁴ = 18715485973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18732263119) 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, 9366131594 + 9366131595.

It is an arithmetic number, because the mean of its divisors is an integer number (9366131595).

Almost surely, 2^18732263189 is an apocalyptic number.

It is an amenable number.

18732263189 is a deficient number, since it is larger than the sum of its proper divisors (1).

18732263189 is an equidigital number, since it uses as much as digits as its factorization.

18732263189 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 870912, while the sum is 50.

The spelling of 18732263189 in words is "eighteen billion, seven hundred thirty-two million, two hundred sixty-three thousand, one hundred eighty-nine".