18273882 has 64 divisors (see below), whose sum is σ = 41969664. Its totient is φ = 5255040.

The previous prime is 18273863. The next prime is 18273883. The reversal of 18273882 is 28837281.

It is a self number, because there is not a number n which added to its sum of digits gives 18273882.

It is not an unprimeable number, because it can be changed into a prime (18273883) 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 31 ways as a sum of consecutive naturals, for example, 133318 + ... + 133454.

It is an arithmetic number, because the mean of its divisors is an integer number (655776).

Almost surely, 2^18273882 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18273882, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20984832).

18273882 is an abundant number, since it is smaller than the sum of its proper divisors (23695782).

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

18273882 is a wasteful number, since it uses less digits than its factorization.

18273882 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243.

The product of its digits is 43008, while the sum is 39.

The square root of 18273882 is about 4274.7961354900. The cubic root of 18273882 is about 263.3966651427.

The spelling of 18273882 in words is "eighteen million, two hundred seventy-three thousand, eight hundred eighty-two".