18866130 has 32 divisors (see below), whose sum is σ = 45399744. Its totient is φ = 5017536.

The previous prime is 18866123. The next prime is 18866161. The reversal of 18866130 is 3166881.

It is a super-2 number, since 2×18866130² = 711861722353800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 18866091 and 18866100.

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 15 ways as a sum of consecutive naturals, for example, 16332 + ... + 17448.

It is an arithmetic number, because the mean of its divisors is an integer number (1418742).

Almost surely, 2^18866130 is an apocalyptic number.

18866130 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18866130 is an abundant number, since it is smaller than the sum of its proper divisors (26533614).

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

18866130 is a wasteful number, since it uses less digits than its factorization.

18866130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1690.

The product of its (nonzero) digits is 6912, while the sum is 33.

The square root of 18866130 is about 4343.5158569988. The cubic root of 18866130 is about 266.2119873436.

The spelling of 18866130 in words is "eighteen million, eight hundred sixty-six thousand, one hundred thirty".