18000137 has 2 divisors, whose sum is σ = 18000138. Its totient is φ = 18000136.

The previous prime is 18000089. The next prime is 18000139. The reversal of 18000137 is 73100081.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15241216 + 2758921 = 3904^2 + 1661^2 .

It is an emirp because it is prime and its reverse (73100081) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18000137 - 2⁸ = 17999881 is a prime.

Together with 18000139, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (18000139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9000068 + 9000069.

It is an arithmetic number, because the mean of its divisors is an integer number (9000069).

Almost surely, 2^18000137 is an apocalyptic number.

It is an amenable number.

18000137 is a deficient number, since it is larger than the sum of its proper divisors (1).

18000137 is an equidigital number, since it uses as much as digits as its factorization.

18000137 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 168, while the sum is 20.

The square root of 18000137 is about 4242.6568326934. The cubic root of 18000137 is about 262.0748043110.

The spelling of 18000137 in words is "eighteen million, one hundred thirty-seven", and thus it is an aban number.