18122066 has 4 divisors (see below), whose sum is σ = 27183102. Its totient is φ = 9061032.

The previous prime is 18122059. The next prime is 18122077. The reversal of 18122066 is 66022181.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 17850625 + 271441 = 4225^2 + 521^2 .

It is a super-2 number, since 2×18122066² = 656818552216712, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4530515 + ... + 4530518.

Almost surely, 2^18122066 is an apocalyptic number.

18122066 is a deficient number, since it is larger than the sum of its proper divisors (9061036).

18122066 is an equidigital number, since it uses as much as digits as its factorization.

18122066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9061035.

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

The square root of 18122066 is about 4257.0019967108. The cubic root of 18122066 is about 262.6652190420.

The spelling of 18122066 in words is "eighteen million, one hundred twenty-two thousand, sixty-six".