18212066 has 32 divisors (see below), whose sum is σ = 30730752. Its totient is φ = 8052480.

The previous prime is 18212057. The next prime is 18212069. The reversal of 18212066 is 66021281.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (18212069) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38765 + ... + 39231.

It is an arithmetic number, because the mean of its divisors is an integer number (960336).

Almost surely, 2^18212066 is an apocalyptic number.

18212066 is a deficient number, since it is larger than the sum of its proper divisors (12518686).

18212066 is a wasteful number, since it uses less digits than its factorization.

18212066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 554.

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

The square root of 18212066 is about 4267.5597242452. The cubic root of 18212066 is about 263.0993278045.

The spelling of 18212066 in words is "eighteen million, two hundred twelve thousand, sixty-six".