18908647039 has 2 divisors, whose sum is σ = 18908647040. Its totient is φ = 18908647038.

The previous prime is 18908647007. The next prime is 18908647057. The reversal of 18908647039 is 93074680981.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18908647039 - 2⁵ = 18908647007 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18908644039) 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, 9454323519 + 9454323520.

It is an arithmetic number, because the mean of its divisors is an integer number (9454323520).

Almost surely, 2^18908647039 is an apocalyptic number.

18908647039 is a deficient number, since it is larger than the sum of its proper divisors (1).

18908647039 is an equidigital number, since it uses as much as digits as its factorization.

18908647039 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2612736, while the sum is 55.

The spelling of 18908647039 in words is "eighteen billion, nine hundred eight million, six hundred forty-seven thousand, thirty-nine".