18622 has 4 divisors (see below), whose sum is σ = 27936. Its totient is φ = 9310.

The previous prime is 18617. The next prime is 18637. The reversal of 18622 is 22681.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 22681 = 37 ⋅613.

It is a plaindrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 18622.

It is a congruent number.

It is an unprimeable number.

18622 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 as a sum of consecutive naturals, namely, 4654 + ... + 4657.

It is an arithmetic number, because the mean of its divisors is an integer number (6984).

2¹⁸⁶²² is an apocalyptic number.

18622 is a deficient number, since it is larger than the sum of its proper divisors (9314).

18622 is an equidigital number, since it uses as much as digits as its factorization.

18622 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9313.

The product of its digits is 192, while the sum is 19.

The square root of 18622 is about 136.4624490473. The cubic root of 18622 is about 26.5058726750.

The spelling of 18622 in words is "eighteen thousand, six hundred twenty-two".