18228662 has 4 divisors (see below), whose sum is σ = 27342996. Its totient is φ = 9114330.

The previous prime is 18228659. The next prime is 18228671. The reversal of 18228662 is 26682281.

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, 4557164 + ... + 4557167.

It is an arithmetic number, because the mean of its divisors is an integer number (6835749).

Almost surely, 2^18228662 is an apocalyptic number.

18228662 is a deficient number, since it is larger than the sum of its proper divisors (9114334).

18228662 is an equidigital number, since it uses as much as digits as its factorization.

18228662 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9114333.

The product of its digits is 18432, while the sum is 35.

The square root of 18228662 is about 4269.5037182324. The cubic root of 18228662 is about 263.1792211895.

The spelling of 18228662 in words is "eighteen million, two hundred twenty-eight thousand, six hundred sixty-two".