18866116 has 6 divisors (see below), whose sum is σ = 33015710. Its totient is φ = 9433056.

The previous prime is 18866101. The next prime is 18866117. The reversal of 18866116 is 61166881.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 10432900 + 8433216 = 3230^2 + 2904^2 .

It is not an unprimeable number, because it can be changed into a prime (18866117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2358261 + ... + 2358268.

Almost surely, 2^18866116 is an apocalyptic number.

It is an amenable number.

18866116 is a deficient number, since it is larger than the sum of its proper divisors (14149594).

18866116 is a wasteful number, since it uses less digits than its factorization.

18866116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4716533 (or 4716531 counting only the distinct ones).

The product of its digits is 13824, while the sum is 37.

The square root of 18866116 is about 4343.5142454008. The cubic root of 18866116 is about 266.2119214942.

The spelling of 18866116 in words is "eighteen million, eight hundred sixty-six thousand, one hundred sixteen".