18281084 has 12 divisors (see below), whose sum is σ = 32469864. Its totient is φ = 9003984.

The previous prime is 18281077. The next prime is 18281089. The reversal of 18281084 is 48018281.

It is a self number, because there is not a number n which added to its sum of digits gives 18281084.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18281089) 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, 33839 + ... + 34374.

It is an arithmetic number, because the mean of its divisors is an integer number (2705822).

Almost surely, 2^18281084 is an apocalyptic number.

It is an amenable number.

18281084 is a deficient number, since it is larger than the sum of its proper divisors (14188780).

18281084 is a wasteful number, since it uses less digits than its factorization.

18281084 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68284 (or 68282 counting only the distinct ones).

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

The square root of 18281084 is about 4275.6384318602. The cubic root of 18281084 is about 263.4312634039.

The spelling of 18281084 in words is "eighteen million, two hundred eighty-one thousand, eighty-four".