18133738489 has 2 divisors, whose sum is σ = 18133738490. Its totient is φ = 18133738488.

The previous prime is 18133738451. The next prime is 18133738543. The reversal of 18133738489 is 98483733181.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10341262864 + 7792475625 = 101692^2 + 88275^2 .

It is a cyclic number.

It is not a de Polignac number, because 18133738489 - 2¹¹ = 18133736441 is a prime.

It is not a weakly prime, because it can be changed into another prime (18133732489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9066869244 + 9066869245.

It is an arithmetic number, because the mean of its divisors is an integer number (9066869245).

Almost surely, 2^18133738489 is an apocalyptic number.

It is an amenable number.

18133738489 is a deficient number, since it is larger than the sum of its proper divisors (1).

18133738489 is an equidigital number, since it uses as much as digits as its factorization.

18133738489 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3483648, while the sum is 55.

The spelling of 18133738489 in words is "eighteen billion, one hundred thirty-three million, seven hundred thirty-eight thousand, four hundred eighty-nine".