18480656 has 20 divisors (see below), whose sum is σ = 37041900. Its totient is φ = 8921472.

The previous prime is 18480647. The next prime is 18480691. The reversal of 18480656 is 65608481.

It can be written as a sum of positive squares in 2 ways, for example, as 14137600 + 4343056 = 3760^2 + 2084^2 .

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, 19451 + ... + 20378.

It is an arithmetic number, because the mean of its divisors is an integer number (1852095).

Almost surely, 2^18480656 is an apocalyptic number.

18480656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

18480656 is an abundant number, since it is smaller than the sum of its proper divisors (18561244).

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

18480656 is a wasteful number, since it uses less digits than its factorization.

18480656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39866 (or 39860 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 38.

The square root of 18480656 is about 4298.9133510691. The cubic root of 18480656 is about 264.3864099646.

The spelling of 18480656 in words is "eighteen million, four hundred eighty thousand, six hundred fifty-six".