18436529 has 2 divisors, whose sum is σ = 18436530. Its totient is φ = 18436528.

The previous prime is 18436513. The next prime is 18436531. The reversal of 18436529 is 92563481.

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., 14047504 + 4389025 = 3748^2 + 2095^2 .

It is a cyclic number.

It is not a de Polignac number, because 18436529 - 2⁴ = 18436513 is a prime.

Together with 18436531, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 18436492 and 18436501.

It is not a weakly prime, because it can be changed into another prime (18436829) 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, 9218264 + 9218265.

It is an arithmetic number, because the mean of its divisors is an integer number (9218265).

Almost surely, 2^18436529 is an apocalyptic number.

It is an amenable number.

18436529 is a deficient number, since it is larger than the sum of its proper divisors (1).

18436529 is an equidigital number, since it uses as much as digits as its factorization.

18436529 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 51840, while the sum is 38.

The square root of 18436529 is about 4293.7779402293. Note that the first 3 decimals coincide. The cubic root of 18436529 is about 264.1758135977.

The spelling of 18436529 in words is "eighteen million, four hundred thirty-six thousand, five hundred twenty-nine".