18002322 has 48 divisors (see below), whose sum is σ = 42456960. Its totient is φ = 5479776.

The previous prime is 18002293. The next prime is 18002389. The reversal of 18002322 is 22320081.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 18002295 and 18002304.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 24679 + ... + 25397.

It is an arithmetic number, because the mean of its divisors is an integer number (884520).

Almost surely, 2^18002322 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18002322, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21228480).

18002322 is an abundant number, since it is smaller than the sum of its proper divisors (24454638).

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

18002322 is a wasteful number, since it uses less digits than its factorization.

18002322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 847 (or 844 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 18002322 is about 4242.9143286190. The cubic root of 18002322 is about 262.0854081243.

The spelling of 18002322 in words is "eighteen million, two thousand, three hundred twenty-two".