18468240 has 80 divisors (see below), whose sum is σ = 65436288. Its totient is φ = 4220928.

The previous prime is 18468211. The next prime is 18468251. The reversal of 18468240 is 4286481.

It is a tau number, because it is divible by the number of its divisors (80).

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 15 ways as a sum of consecutive naturals, for example, 3817 + ... + 7176.

Almost surely, 2^18468240 is an apocalyptic number.

18468240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18468240 is an abundant number, since it is smaller than the sum of its proper divisors (46968048).

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

18468240 is a wasteful number, since it uses less digits than its factorization.

18468240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11016 (or 11010 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 33.

The square root of 18468240 is about 4297.4690225760. The cubic root of 18468240 is about 264.3271884545.

The spelling of 18468240 in words is "eighteen million, four hundred sixty-eight thousand, two hundred forty".