18275986 has 24 divisors (see below), whose sum is σ = 30655260. Its totient is φ = 8142336.

The previous prime is 18275981. The next prime is 18275987. The reversal of 18275986 is 68957281.

18275986 is nontrivially palindromic in base 15.

It can be written as a sum of positive squares in 2 ways, for example, as 18275625 + 361 = 4275^2 + 19^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18275981) 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 in 11 ways as a sum of consecutive naturals, for example, 11530 + ... + 13018.

Almost surely, 2^18275986 is an apocalyptic number.

18275986 is a deficient number, since it is larger than the sum of its proper divisors (12379274).

18275986 is a wasteful number, since it uses less digits than its factorization.

18275986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1546 (or 1527 counting only the distinct ones).

The product of its digits is 241920, while the sum is 46.

The square root of 18275986 is about 4275.0422220137. The cubic root of 18275986 is about 263.4067736556.

The spelling of 18275986 in words is "eighteen million, two hundred seventy-five thousand, nine hundred eighty-six".