18018648 has 24 divisors (see below), whose sum is σ = 48800700. Its totient is φ = 6006192.

The previous prime is 18018629. The next prime is 18018661. The reversal of 18018648 is 84681081.

18018648 is a `hidden beast` number, since 1 + 8 + 0 + 1 + 8 + 648 = 666.

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 125058 + ... + 125201.

Almost surely, 2^18018648 is an apocalyptic number.

18018648 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

18018648 is an abundant number, since it is smaller than the sum of its proper divisors (30782052).

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

18018648 is a wasteful number, since it uses less digits than its factorization.

18018648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 250271 (or 250264 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 36.

The square root of 18018648 is about 4244.8378060887. The cubic root of 18018648 is about 262.1646111213.

The spelling of 18018648 in words is "eighteen million, eighteen thousand, six hundred forty-eight".