18222884 has 24 divisors (see below), whose sum is σ = 33264000. Its totient is φ = 8727264.

The previous prime is 18222871. The next prime is 18222913. The reversal of 18222884 is 48822281.

18222884 = 310² + 311² + ... + 438².

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, 8117 + ... + 10115.

It is an arithmetic number, because the mean of its divisors is an integer number (1386000).

Almost surely, 2^18222884 is an apocalyptic number.

It is an amenable number.

18222884 is a deficient number, since it is larger than the sum of its proper divisors (15041116).

18222884 is a wasteful number, since it uses less digits than its factorization.

18222884 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2099 (or 2097 counting only the distinct ones).

The product of its digits is 16384, while the sum is 35.

The square root of 18222884 is about 4268.8270051620. The cubic root of 18222884 is about 263.1514113182.

The spelling of 18222884 in words is "eighteen million, two hundred twenty-two thousand, eight hundred eighty-four".