18184020 has 48 divisors (see below), whose sum is σ = 52297728. Its totient is φ = 4717440.

The previous prime is 18184013. The next prime is 18184021. The reversal of 18184020 is 2048181.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18184021) 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 15 ways as a sum of consecutive naturals, for example, 1876 + ... + 6315.

It is an arithmetic number, because the mean of its divisors is an integer number (1089536).

Almost surely, 2^18184020 is an apocalyptic number.

18184020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18184020 is an abundant number, since it is smaller than the sum of its proper divisors (34113708).

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

18184020 is a wasteful number, since it uses less digits than its factorization.

18184020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8240 (or 8238 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 24.

The square root of 18184020 is about 4264.2725053636. The cubic root of 18184020 is about 262.9642035644.

The spelling of 18184020 in words is "eighteen million, one hundred eighty-four thousand, twenty".