18037361 has 2 divisors, whose sum is σ = 18037362. Its totient is φ = 18037360.

The previous prime is 18037343. The next prime is 18037387. The reversal of 18037361 is 16373081.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16974400 + 1062961 = 4120^2 + 1031^2 .

It is a cyclic number.

It is not a de Polignac number, because 18037361 - 2⁶ = 18037297 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (18037301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9018680 + 9018681.

It is an arithmetic number, because the mean of its divisors is an integer number (9018681).

Almost surely, 2^18037361 is an apocalyptic number.

It is an amenable number.

18037361 is a deficient number, since it is larger than the sum of its proper divisors (1).

18037361 is an equidigital number, since it uses as much as digits as its factorization.

18037361 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 18037361 is about 4247.0414408150. The cubic root of 18037361 is about 262.2553354464.

The spelling of 18037361 in words is "eighteen million, thirty-seven thousand, three hundred sixty-one".