18886045 has 4 divisors (see below), whose sum is σ = 22663260. Its totient is φ = 15108832.

The previous prime is 18886003. The next prime is 18886051. The reversal of 18886045 is 54068881.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54068881 = 6301 ⋅8581.

It can be written as a sum of positive squares in 2 ways, for example, as 13039321 + 5846724 = 3611^2 + 2418^2 .

It is a cyclic number.

It is not a de Polignac number, because 18886045 - 2¹⁷ = 18754973 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 18885989 and 18886007.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1888600 + ... + 1888609.

It is an arithmetic number, because the mean of its divisors is an integer number (5665815).

Almost surely, 2^18886045 is an apocalyptic number.

It is an amenable number.

18886045 is a deficient number, since it is larger than the sum of its proper divisors (3777215).

18886045 is an equidigital number, since it uses as much as digits as its factorization.

18886045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3777214.

The product of its (nonzero) digits is 61440, while the sum is 40.

The square root of 18886045 is about 4345.8077500046. The cubic root of 18886045 is about 266.3056251196.

The spelling of 18886045 in words is "eighteen million, eight hundred eighty-six thousand, forty-five".