18643523282 has 16 divisors (see below), whose sum is σ = 28326850200. Its totient is φ = 9201876480.

The previous prime is 18643523281. The next prime is 18643523291. The reversal of 18643523282 is 28232534681.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 14708595841 + 3934927441 = 121279^2 + 62729^2 .

It is not an unprimeable number, because it can be changed into a prime (18643523281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 100319 + ... + 217602.

Almost surely, 2^18643523282 is an apocalyptic number.

18643523282 is a deficient number, since it is larger than the sum of its proper divisors (9683326918).

18643523282 is a wasteful number, since it uses less digits than its factorization.

18643523282 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 318301.

The product of its digits is 552960, while the sum is 44.

The spelling of 18643523282 in words is "eighteen billion, six hundred forty-three million, five hundred twenty-three thousand, two hundred eighty-two".