18229116 has 24 divisors (see below), whose sum is σ = 43907584. Its totient is φ = 5880240.

The previous prime is 18229109. The next prime is 18229121. The reversal of 18229116 is 61192281.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24130 + ... + 24873.

Almost surely, 2^18229116 is an apocalyptic number.

It is an amenable number.

18229116 is an abundant number, since it is smaller than the sum of its proper divisors (25678468).

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

18229116 is a wasteful number, since it uses less digits than its factorization.

18229116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49041 (or 49039 counting only the distinct ones).

The product of its digits is 1728, while the sum is 30.

The square root of 18229116 is about 4269.5568856733. The cubic root of 18229116 is about 263.1814060706.

The spelling of 18229116 in words is "eighteen million, two hundred twenty-nine thousand, one hundred sixteen".