18666936 has 40 divisors (see below), whose sum is σ = 52286520. Its totient is φ = 6222096.

The previous prime is 18666919. The next prime is 18666941. The reversal of 18666936 is 63966681.

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 18666891 and 18666900.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 13756 + ... + 15051.

It is an arithmetic number, because the mean of its divisors is an integer number (1307163).

Almost surely, 2^18666936 is an apocalyptic number.

It is an amenable number.

18666936 is an abundant number, since it is smaller than the sum of its proper divisors (33619584).

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

18666936 is a wasteful number, since it uses less digits than its factorization.

18666936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28825 (or 28812 counting only the distinct ones).

The product of its digits is 279936, while the sum is 45.

The square root of 18666936 is about 4320.5249681028. The cubic root of 18666936 is about 265.2717563450.

The spelling of 18666936 in words is "eighteen million, six hundred sixty-six thousand, nine hundred thirty-six".