18636041 has 2 divisors, whose sum is σ = 18636042. Its totient is φ = 18636040.

The previous prime is 18636011. The next prime is 18636047. The reversal of 18636041 is 14063681.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16687225 + 1948816 = 4085^2 + 1396^2 .

It is a cyclic number.

It is not a de Polignac number, because 18636041 - 2¹⁸ = 18373897 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 18635995 and 18636013.

It is not a weakly prime, because it can be changed into another prime (18636047) 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, 9318020 + 9318021.

It is an arithmetic number, because the mean of its divisors is an integer number (9318021).

Almost surely, 2^18636041 is an apocalyptic number.

It is an amenable number.

18636041 is a deficient number, since it is larger than the sum of its proper divisors (1).

18636041 is an equidigital number, since it uses as much as digits as its factorization.

18636041 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 18636041 is about 4316.9481118031. The cubic root of 18636041 is about 265.1253281635.

The spelling of 18636041 in words is "eighteen million, six hundred thirty-six thousand, forty-one".