18668322 has 12 divisors (see below), whose sum is σ = 40448070. Its totient is φ = 6222768.

The previous prime is 18668303. The next prime is 18668323. The reversal of 18668322 is 22386681.

It can be written as a sum of positive squares in only one way, i.e., 14220441 + 4447881 = 3771^2 + 2109^2 .

It is not an unprimeable number, because it can be changed into a prime (18668323) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 518547 + ... + 518582.

Almost surely, 2^18668322 is an apocalyptic number.

18668322 is an abundant number, since it is smaller than the sum of its proper divisors (21779748).

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

18668322 is a wasteful number, since it uses less digits than its factorization.

18668322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1037137 (or 1037134 counting only the distinct ones).

The product of its digits is 27648, while the sum is 36.

The square root of 18668322 is about 4320.6853623008. The cubic root of 18668322 is about 265.2783215637.

The spelling of 18668322 in words is "eighteen million, six hundred sixty-eight thousand, three hundred twenty-two".