18340374 has 32 divisors (see below), whose sum is σ = 40055904. Its totient is φ = 5564160.

The previous prime is 18340373. The next prime is 18340391. The reversal of 18340374 is 47304381.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18340373) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4084 + ... + 7304.

It is an arithmetic number, because the mean of its divisors is an integer number (1251747).

Almost surely, 2^18340374 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18340374, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20027952).

18340374 is an abundant number, since it is smaller than the sum of its proper divisors (21715530).

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

18340374 is a wasteful number, since it uses less digits than its factorization.

18340374 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3312.

The product of its (nonzero) digits is 8064, while the sum is 30.

The square root of 18340374 is about 4282.5662867024. The cubic root of 18340374 is about 263.7157466205.

The spelling of 18340374 in words is "eighteen million, three hundred forty thousand, three hundred seventy-four".