18636133 has 2 divisors, whose sum is σ = 18636134. Its totient is φ = 18636132.

The previous prime is 18636127. The next prime is 18636139. The reversal of 18636133 is 33163681.

It is a balanced prime because it is at equal distance from previous prime (18636127) and next prime (18636139).

It can be written as a sum of positive squares in only one way, i.e., 14884164 + 3751969 = 3858^2 + 1937^2 .

It is a cyclic number.

It is not a de Polignac number, because 18636133 - 2¹³ = 18627941 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18636095 and 18636104.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18636139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9318066 + 9318067.

It is an arithmetic number, because the mean of its divisors is an integer number (9318067).

Almost surely, 2^18636133 is an apocalyptic number.

It is an amenable number.

18636133 is a deficient number, since it is larger than the sum of its proper divisors (1).

18636133 is an equidigital number, since it uses as much as digits as its factorization.

18636133 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7776, while the sum is 31.

The square root of 18636133 is about 4316.9587674658. The cubic root of 18636133 is about 265.1257644416.

It can be divided in two parts, 18636 and 133, that added together give a square (18769 = 137²).

The spelling of 18636133 in words is "eighteen million, six hundred thirty-six thousand, one hundred thirty-three".