18182840 has 64 divisors (see below), whose sum is σ = 44755200. Its totient is φ = 6607872.

The previous prime is 18182839. The next prime is 18182849. The reversal of 18182840 is 4828181.

It is a junction number, because it is equal to n+sod(n) for n = 18182797 and 18182806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18182849) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37721 + ... + 38199.

It is an arithmetic number, because the mean of its divisors is an integer number (699300).

Almost surely, 2^18182840 is an apocalyptic number.

18182840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18182840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22377600).

18182840 is an abundant number, since it is smaller than the sum of its proper divisors (26572360).

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

18182840 is a wasteful number, since it uses less digits than its factorization.

18182840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 576 (or 572 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 32.

The square root of 18182840 is about 4264.1341442314. The cubic root of 18182840 is about 262.9585153379.

The spelling of 18182840 in words is "eighteen million, one hundred eighty-two thousand, eight hundred forty".