18868986 has 24 divisors (see below), whose sum is σ = 41019264. Its totient is φ = 6268680.

The previous prime is 18868973. The next prime is 18868999. The reversal of 18868986 is 68986881.

It is an interprime number because it is at equal distance from previous prime (18868973) and next prime (18868999).

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 4375 + ... + 7541.

It is an arithmetic number, because the mean of its divisors is an integer number (1709136).

Almost surely, 2^18868986 is an apocalyptic number.

18868986 is an abundant number, since it is smaller than the sum of its proper divisors (22150278).

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

18868986 is a wasteful number, since it uses less digits than its factorization.

18868986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3506 (or 3503 counting only the distinct ones).

The product of its digits is 1327104, while the sum is 54.

The square root of 18868986 is about 4343.8446104804. The cubic root of 18868986 is about 266.2254199354.

The spelling of 18868986 in words is "eighteen million, eight hundred sixty-eight thousand, nine hundred eighty-six".