18671052089 has 2 divisors, whose sum is σ = 18671052090. Its totient is φ = 18671052088.

The previous prime is 18671052019. The next prime is 18671052091. The reversal of 18671052089 is 98025017681.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16200962089 + 2470090000 = 127283^2 + 49700^2 .

It is a cyclic number.

It is not a de Polignac number, because 18671052089 - 2²⁸ = 18402616633 is a prime.

It is a super-2 number, since 2×18671052089² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

Together with 18671052091, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (18671052019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9335526044 + 9335526045.

It is an arithmetic number, because the mean of its divisors is an integer number (9335526045).

Almost surely, 2^18671052089 is an apocalyptic number.

It is an amenable number.

18671052089 is a deficient number, since it is larger than the sum of its proper divisors (1).

18671052089 is an equidigital number, since it uses as much as digits as its factorization.

18671052089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 241920, while the sum is 47.

The spelling of 18671052089 in words is "eighteen billion, six hundred seventy-one million, fifty-two thousand, eighty-nine".