18136207 has 2 divisors, whose sum is σ = 18136208. Its totient is φ = 18136206.

The previous prime is 18136189. The next prime is 18136211. The reversal of 18136207 is 70263181.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18136207 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18136277) 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, 9068103 + 9068104.

It is an arithmetic number, because the mean of its divisors is an integer number (9068104).

Almost surely, 2^18136207 is an apocalyptic number.

18136207 is a deficient number, since it is larger than the sum of its proper divisors (1).

18136207 is an equidigital number, since it uses as much as digits as its factorization.

18136207 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 18136207 is about 4258.6625834879. The cubic root of 18136207 is about 262.7335222026.

Adding to 18136207 its reverse (70263181), we get a palindrome (88399388).

The spelling of 18136207 in words is "eighteen million, one hundred thirty-six thousand, two hundred seven".