18436337 has 2 divisors, whose sum is σ = 18436338. Its totient is φ = 18436336.

The previous prime is 18436321. The next prime is 18436343. The reversal of 18436337 is 73363481.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17606416 + 829921 = 4196^2 + 911^2 .

It is an emirp because it is prime and its reverse (73363481) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18436337 - 2⁴ = 18436321 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 18436297 and 18436306.

It is not a weakly prime, because it can be changed into another prime (18436307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9218168 + 9218169.

It is an arithmetic number, because the mean of its divisors is an integer number (9218169).

Almost surely, 2^18436337 is an apocalyptic number.

It is an amenable number.

18436337 is a deficient number, since it is larger than the sum of its proper divisors (1).

18436337 is an equidigital number, since it uses as much as digits as its factorization.

18436337 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36288, while the sum is 35.

The square root of 18436337 is about 4293.7555822380. The cubic root of 18436337 is about 264.1748965427.

The spelling of 18436337 in words is "eighteen million, four hundred thirty-six thousand, three hundred thirty-seven".