18804986 has 4 divisors (see below), whose sum is σ = 28207482. Its totient is φ = 9402492.

The previous prime is 18804977. The next prime is 18804997. The reversal of 18804986 is 68940881.

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., 18619225 + 185761 = 4315^2 + 431^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4701245 + ... + 4701248.

Almost surely, 2^18804986 is an apocalyptic number.

18804986 is a deficient number, since it is larger than the sum of its proper divisors (9402496).

18804986 is an equidigital number, since it uses as much as digits as its factorization.

18804986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9402495.

The product of its (nonzero) digits is 110592, while the sum is 44.

The square root of 18804986 is about 4336.4716071940. The cubic root of 18804986 is about 265.9240837118.

The spelling of 18804986 in words is "eighteen million, eight hundred four thousand, nine hundred eighty-six".