18468880 has 20 divisors (see below), whose sum is σ = 42940332. Its totient is φ = 7387520.

The previous prime is 18468871. The next prime is 18468899. The reversal of 18468880 is 8886481.

It can be written as a sum of positive squares in 2 ways, for example, as 4210704 + 14258176 = 2052^2 + 3776^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 115351 + ... + 115510.

Almost surely, 2^18468880 is an apocalyptic number.

18468880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18468880 is an abundant number, since it is smaller than the sum of its proper divisors (24471452).

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

18468880 is a wasteful number, since it uses less digits than its factorization.

18468880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 230874 (or 230868 counting only the distinct ones).

The product of its (nonzero) digits is 98304, while the sum is 43.

The square root of 18468880 is about 4297.5434843641. The cubic root of 18468880 is about 264.3302417583.

The spelling of 18468880 in words is "eighteen million, four hundred sixty-eight thousand, eight hundred eighty".