18082637 has 2 divisors, whose sum is σ = 18082638. Its totient is φ = 18082636.

The previous prime is 18082633. The next prime is 18082651. The reversal of 18082637 is 73628081.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9897316 + 8185321 = 3146^2 + 2861^2 .

It is an emirp because it is prime and its reverse (73628081) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18082637 - 2² = 18082633 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 18082597 and 18082606.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18082633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9041318 + 9041319.

It is an arithmetic number, because the mean of its divisors is an integer number (9041319).

Almost surely, 2^18082637 is an apocalyptic number.

It is an amenable number.

18082637 is a deficient number, since it is larger than the sum of its proper divisors (1).

18082637 is an equidigital number, since it uses as much as digits as its factorization.

18082637 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 18082637 is about 4252.3683989043. The cubic root of 18082637 is about 262.4745831778.

The spelling of 18082637 in words is "eighteen million, eighty-two thousand, six hundred thirty-seven".