18383922 has 40 divisors (see below), whose sum is σ = 41451696. Its totient is φ = 6114852.

The previous prime is 18383921. The next prime is 18383927. The reversal of 18383922 is 22938381.

It is a happy number.

18383922 is nontrivially palindromic in base 12.

It is not an unprimeable number, because it can be changed into a prime (18383921) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 39133 + ... + 39599.

Almost surely, 2^18383922 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18383922, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20725848).

18383922 is an abundant number, since it is smaller than the sum of its proper divisors (23067774).

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

18383922 is an frugal number, since it uses more digits than its factorization.

18383922 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 496 (or 472 counting only the distinct ones).

The product of its digits is 20736, while the sum is 36.

The square root of 18383922 is about 4287.6476067886. The cubic root of 18383922 is about 263.9243068120.

The spelling of 18383922 in words is "eighteen million, three hundred eighty-three thousand, nine hundred twenty-two".