18226766 has 4 divisors (see below), whose sum is σ = 27340152. Its totient is φ = 9113382.

The previous prime is 18226759. The next prime is 18226799. The reversal of 18226766 is 66762281.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4556690 + ... + 4556693.

It is an arithmetic number, because the mean of its divisors is an integer number (6835038).

Almost surely, 2^18226766 is an apocalyptic number.

18226766 is a deficient number, since it is larger than the sum of its proper divisors (9113386).

18226766 is an equidigital number, since it uses as much as digits as its factorization.

18226766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9113385.

The product of its digits is 48384, while the sum is 38.

The square root of 18226766 is about 4269.2816726002. The cubic root of 18226766 is about 263.1700962722.

The spelling of 18226766 in words is "eighteen million, two hundred twenty-six thousand, seven hundred sixty-six".