18180733706 has 4 divisors (see below), whose sum is σ = 27271100562. Its totient is φ = 9090366852.

The previous prime is 18180733673. The next prime is 18180733741. The reversal of 18180733706 is 60733708181.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 60733708181 = 173 ⋅351061897.

It can be written as a sum of positive squares in only one way, i.e., 17185899025 + 994834681 = 131095^2 + 31541^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4545183425 + ... + 4545183428.

Almost surely, 2^18180733706 is an apocalyptic number.

18180733706 is a deficient number, since it is larger than the sum of its proper divisors (9090366856).

18180733706 is an equidigital number, since it uses as much as digits as its factorization.

18180733706 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9090366855.

The product of its (nonzero) digits is 169344, while the sum is 44.

The spelling of 18180733706 in words is "eighteen billion, one hundred eighty million, seven hundred thirty-three thousand, seven hundred six".