18066212 has 12 divisors (see below), whose sum is σ = 32470620. Its totient is φ = 8788896.

The previous prime is 18066203. The next prime is 18066221. The reversal of 18066212 is 21266081.

It is an interprime number because it is at equal distance from previous prime (18066203) and next prime (18066221).

It can be written as a sum of positive squares in 2 ways, for example, as 7268416 + 10797796 = 2696^2 + 3286^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 60887 + ... + 61182.

It is an arithmetic number, because the mean of its divisors is an integer number (2705885).

Almost surely, 2^18066212 is an apocalyptic number.

It is an amenable number.

18066212 is a deficient number, since it is larger than the sum of its proper divisors (14404408).

18066212 is a wasteful number, since it uses less digits than its factorization.

18066212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122110 (or 122108 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 18066212 is about 4250.4366834479. The cubic root of 18066212 is about 262.3950879323.

The spelling of 18066212 in words is "eighteen million, sixty-six thousand, two hundred twelve".