18021882 has 8 divisors (see below), whose sum is σ = 36043776. Its totient is φ = 6007292.

The previous prime is 18021841. The next prime is 18021889. The reversal of 18021882 is 28812081.

It is a sphenic number, since it is the product of 3 distinct primes.

18021882 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (18021889) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1501818 + ... + 1501829.

It is an arithmetic number, because the mean of its divisors is an integer number (4505472).

Almost surely, 2^18021882 is an apocalyptic number.

18021882 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

18021882 is a wasteful number, since it uses less digits than its factorization.

18021882 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3003652.

The product of its (nonzero) digits is 2048, while the sum is 30.

The square root of 18021882 is about 4245.2187222804. The cubic root of 18021882 is about 262.1802946812.

It can be divided in two parts, 180218 and 82, that added together give a triangular number (180300 = T₆₀₀).

The spelling of 18021882 in words is "eighteen million, twenty-one thousand, eight hundred eighty-two".