18229316 has 24 divisors (see below), whose sum is σ = 36630720. Its totient is φ = 7775712.

The previous prime is 18229261. The next prime is 18229327. The reversal of 18229316 is 61392281.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4991 + ... + 7833.

It is an arithmetic number, because the mean of its divisors is an integer number (1526280).

Almost surely, 2^18229316 is an apocalyptic number.

It is an amenable number.

18229316 is an abundant number, since it is smaller than the sum of its proper divisors (18401404).

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

18229316 is a wasteful number, since it uses less digits than its factorization.

18229316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3083 (or 3081 counting only the distinct ones).

The product of its digits is 5184, while the sum is 32.

The square root of 18229316 is about 4269.5803072433. The cubic root of 18229316 is about 263.1823685617.

The spelling of 18229316 in words is "eighteen million, two hundred twenty-nine thousand, three hundred sixteen".