18252187 has 2 divisors, whose sum is σ = 18252188. Its totient is φ = 18252186.

The previous prime is 18252163. The next prime is 18252197. The reversal of 18252187 is 78125281.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18252187 is a prime.

It is not a weakly prime, because it can be changed into another prime (18252197) 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, 9126093 + 9126094.

It is an arithmetic number, because the mean of its divisors is an integer number (9126094).

Almost surely, 2^18252187 is an apocalyptic number.

18252187 is a deficient number, since it is larger than the sum of its proper divisors (1).

18252187 is an equidigital number, since it uses as much as digits as its factorization.

18252187 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8960, while the sum is 34.

The square root of 18252187 is about 4272.2578339796. The cubic root of 18252187 is about 263.2923878370.

The spelling of 18252187 in words is "eighteen million, two hundred fifty-two thousand, one hundred eighty-seven".