18022342186 has 4 divisors (see below), whose sum is σ = 27033513282. Its totient is φ = 9011171092.

The previous prime is 18022342171. The next prime is 18022342207. The reversal of 18022342186 is 68124322081.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 12377675025 + 5644667161 = 111255^2 + 75131^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4505585545 + ... + 4505585548.

Almost surely, 2^18022342186 is an apocalyptic number.

18022342186 is a deficient number, since it is larger than the sum of its proper divisors (9011171096).

18022342186 is an equidigital number, since it uses as much as digits as its factorization.

18022342186 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9011171095.

The product of its (nonzero) digits is 36864, while the sum is 37.

The spelling of 18022342186 in words is "eighteen billion, twenty-two million, three hundred forty-two thousand, one hundred eighty-six".