18641322 has 48 divisors (see below), whose sum is σ = 46455552. Its totient is φ = 5292000.

The previous prime is 18641309. The next prime is 18641327. The reversal of 18641322 is 22314681.

18641322 is a `hidden beast` number, since 18 + 641 + 3 + 2 + 2 = 666.

It is not an unprimeable number, because it can be changed into a prime (18641327) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 24447 + ... + 25197.

It is an arithmetic number, because the mean of its divisors is an integer number (967824).

Almost surely, 2^18641322 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18641322, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23227776).

18641322 is an abundant number, since it is smaller than the sum of its proper divisors (27814230).

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

18641322 is a wasteful number, since it uses less digits than its factorization.

18641322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 963 (or 960 counting only the distinct ones).

The product of its digits is 2304, while the sum is 27.

The square root of 18641322 is about 4317.5597274386. The cubic root of 18641322 is about 265.1503691513.

The spelling of 18641322 in words is "eighteen million, six hundred forty-one thousand, three hundred twenty-two".