18206766 has 24 divisors (see below), whose sum is σ = 40289184. Its totient is φ = 5939520.

The previous prime is 18206761. The next prime is 18206767. The reversal of 18206766 is 66760281.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 18206766.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18206761) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 9915 + ... + 11606.

It is an arithmetic number, because the mean of its divisors is an integer number (1678716).

Almost surely, 2^18206766 is an apocalyptic number.

18206766 is an abundant number, since it is smaller than the sum of its proper divisors (22082418).

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

18206766 is a wasteful number, since it uses less digits than its factorization.

18206766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21576 (or 21573 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 18206766 is about 4266.9387152852. The cubic root of 18206766 is about 263.0738033029.

The spelling of 18206766 in words is "eighteen million, two hundred six thousand, seven hundred sixty-six".