18181794 has 16 divisors (see below), whose sum is σ = 36980640. Its totient is φ = 5957760.

The previous prime is 18181783. The next prime is 18181817. The reversal of 18181794 is 49718181.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25327 + ... + 26034.

It is an arithmetic number, because the mean of its divisors is an integer number (2311290).

Almost surely, 2^18181794 is an apocalyptic number.

18181794 is an abundant number, since it is smaller than the sum of its proper divisors (18798846).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18181794 is a wasteful number, since it uses less digits than its factorization.

18181794 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51425.

The product of its digits is 16128, while the sum is 39.

The square root of 18181794 is about 4264.0114915417. The cubic root of 18181794 is about 262.9534728568.

The spelling of 18181794 in words is "eighteen million, one hundred eighty-one thousand, seven hundred ninety-four".