18422 has 8 divisors (see below), whose sum is σ = 28272. Its totient is φ = 9000.

The previous prime is 18413. The next prime is 18427. The reversal of 18422 is 22481.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 18422.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 18422.

It is not an unprimeable number, because it can be changed into a prime (18427) by changing a digit.

18422 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47 + ... + 197.

It is an arithmetic number, because the mean of its divisors is an integer number (3534).

2¹⁸⁴²² is an apocalyptic number.

18422 is a deficient number, since it is larger than the sum of its proper divisors (9850).

18422 is a wasteful number, since it uses less digits than its factorization.

18422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214.

The product of its digits is 128, while the sum is 17.

The square root of 18422 is about 135.7276685131. The cubic root of 18422 is about 26.4106400332.

The spelling of 18422 in words is "eighteen thousand, four hundred twenty-two".