18886885 has 4 divisors (see below), whose sum is σ = 22664268. Its totient is φ = 15109504.

The previous prime is 18886883. The next prime is 18886913. The reversal of 18886885 is 58868881.

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

It can be written as a sum of positive squares in 2 ways, for example, as 3157729 + 15729156 = 1777^2 + 3966^2 .

It is a cyclic number.

It is not a de Polignac number, because 18886885 - 2¹ = 18886883 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18886883) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1888684 + ... + 1888693.

It is an arithmetic number, because the mean of its divisors is an integer number (5666067).

Almost surely, 2^18886885 is an apocalyptic number.

It is an amenable number.

18886885 is a deficient number, since it is larger than the sum of its proper divisors (3777383).

18886885 is an equidigital number, since it uses as much as digits as its factorization.

18886885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3777382.

The product of its digits is 983040, while the sum is 52.

The square root of 18886885 is about 4345.9043937942. The cubic root of 18886885 is about 266.3095732448.

The spelling of 18886885 in words is "eighteen million, eight hundred eighty-six thousand, eight hundred eighty-five".