18222284 has 12 divisors (see below), whose sum is σ = 31978464. Its totient is φ = 9085584.

The previous prime is 18222277. The next prime is 18222287. The reversal of 18222284 is 48222281.

It is a hoax number, since the sum of its digits (29) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (18222287) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4739 + ... + 7674.

It is an arithmetic number, because the mean of its divisors is an integer number (2664872).

Almost surely, 2^18222284 is an apocalyptic number.

It is an amenable number.

18222284 is a deficient number, since it is larger than the sum of its proper divisors (13756180).

18222284 is a wasteful number, since it uses less digits than its factorization.

18222284 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12784 (or 12782 counting only the distinct ones).

The product of its digits is 4096, while the sum is 29.

The square root of 18222284 is about 4268.7567276667. The cubic root of 18222284 is about 263.1485231442.

The spelling of 18222284 in words is "eighteen million, two hundred twenty-two thousand, two hundred eighty-four".