18321422 has 16 divisors (see below), whose sum is σ = 31463520. Its totient is φ = 7838208.

The previous prime is 18321419. The next prime is 18321431. The reversal of 18321422 is 22412381.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13478 + ... + 14774.

It is an arithmetic number, because the mean of its divisors is an integer number (1966470).

Almost surely, 2^18321422 is an apocalyptic number.

18321422 is a deficient number, since it is larger than the sum of its proper divisors (13142098).

18321422 is a wasteful number, since it uses less digits than its factorization.

18321422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2315.

The product of its digits is 768, while the sum is 23.

The square root of 18321422 is about 4280.3530228242. The cubic root of 18321422 is about 263.6248785470.

The spelling of 18321422 in words is "eighteen million, three hundred twenty-one thousand, four hundred twenty-two".