18867055 has 4 divisors (see below), whose sum is σ = 22640472. Its totient is φ = 15093640.

The previous prime is 18867053. The next prime is 18867071. The reversal of 18867055 is 55076881.

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

It is not a de Polignac number, because 18867055 - 2¹ = 18867053 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18866999 and 18867017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18867053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1886701 + ... + 1886710.

It is an arithmetic number, because the mean of its divisors is an integer number (5660118).

Almost surely, 2^18867055 is an apocalyptic number.

18867055 is a deficient number, since it is larger than the sum of its proper divisors (3773417).

18867055 is an equidigital number, since it uses as much as digits as its factorization.

18867055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3773416.

The product of its (nonzero) digits is 67200, while the sum is 40.

The square root of 18867055 is about 4343.6223362535. The cubic root of 18867055 is about 266.2163380338.

The spelling of 18867055 in words is "eighteen million, eight hundred sixty-seven thousand, fifty-five".