18908332159 has 2 divisors, whose sum is σ = 18908332160. Its totient is φ = 18908332158.

The previous prime is 18908332141. The next prime is 18908332187. The reversal of 18908332159 is 95123380981.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18908332159 - 2¹⁹ = 18907807871 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18908332139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9454166079 + 9454166080.

It is an arithmetic number, because the mean of its divisors is an integer number (9454166080).

Almost surely, 2^18908332159 is an apocalyptic number.

18908332159 is a deficient number, since it is larger than the sum of its proper divisors (1).

18908332159 is an equidigital number, since it uses as much as digits as its factorization.

18908332159 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 466560, while the sum is 49.

The spelling of 18908332159 in words is "eighteen billion, nine hundred eight million, three hundred thirty-two thousand, one hundred fifty-nine".