18320382 has 12 divisors (see below), whose sum is σ = 39694200. Its totient is φ = 6106788.

The previous prime is 18320371. The next prime is 18320387. The reversal of 18320382 is 28302381.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18320387) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 508882 + ... + 508917.

It is an arithmetic number, because the mean of its divisors is an integer number (3307850).

Almost surely, 2^18320382 is an apocalyptic number.

18320382 is an abundant number, since it is smaller than the sum of its proper divisors (21373818).

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

18320382 is a wasteful number, since it uses less digits than its factorization.

18320382 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1017807 (or 1017804 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 18320382 is about 4280.2315357934. The cubic root of 18320382 is about 263.6198903050.

It can be divided in two parts, 18 and 320382, that added together give a triangular number (320400 = T₈₀₀).

The spelling of 18320382 in words is "eighteen million, three hundred twenty thousand, three hundred eighty-two".