18386356 has 6 divisors (see below), whose sum is σ = 32176130. Its totient is φ = 9193176.

The previous prime is 18386351. The next prime is 18386363. The reversal of 18386356 is 65368381.

It can be written as a sum of positive squares in only one way, i.e., 13395600 + 4990756 = 3660^2 + 2234^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18386351) 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, 2298291 + ... + 2298298.

Almost surely, 2^18386356 is an apocalyptic number.

It is an amenable number.

18386356 is a deficient number, since it is larger than the sum of its proper divisors (13789774).

18386356 is a wasteful number, since it uses less digits than its factorization.

18386356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4596593 (or 4596591 counting only the distinct ones).

The product of its digits is 103680, while the sum is 40.

The square root of 18386356 is about 4287.9314360190. The cubic root of 18386356 is about 263.9359540077.

The spelling of 18386356 in words is "eighteen million, three hundred eighty-six thousand, three hundred fifty-six".