18705956 has 12 divisors (see below), whose sum is σ = 34458480. Its totient is φ = 8860680.

The previous prime is 18705949. The next prime is 18705977. The reversal of 18705956 is 65950781.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 122990 + ... + 123141.

It is an arithmetic number, because the mean of its divisors is an integer number (2871540).

Almost surely, 2^18705956 is an apocalyptic number.

It is an amenable number.

18705956 is a deficient number, since it is larger than the sum of its proper divisors (15752524).

18705956 is a wasteful number, since it uses less digits than its factorization.

18705956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 246154 (or 246152 counting only the distinct ones).

The product of its (nonzero) digits is 75600, while the sum is 41.

The square root of 18705956 is about 4325.0382657267. The cubic root of 18705956 is about 265.4564626092.

The spelling of 18705956 in words is "eighteen million, seven hundred five thousand, nine hundred fifty-six".