18171342 has 48 divisors (see below), whose sum is σ = 46556640. Its totient is φ = 5011776.

The previous prime is 18171341. The next prime is 18171347. The reversal of 18171342 is 24317181.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18171341) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1168 + ... + 6140.

It is an arithmetic number, because the mean of its divisors is an integer number (969930).

Almost surely, 2^18171342 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18171342, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23278320).

18171342 is an abundant number, since it is smaller than the sum of its proper divisors (28385298).

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

18171342 is a wasteful number, since it uses less digits than its factorization.

18171342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5017 (or 5014 counting only the distinct ones).

The product of its digits is 1344, while the sum is 27.

The square root of 18171342 is about 4262.7857088998. The cubic root of 18171342 is about 262.9030759870.

The spelling of 18171342 in words is "eighteen million, one hundred seventy-one thousand, three hundred forty-two".