18480680 has 32 divisors (see below), whose sum is σ = 42157800. Its totient is φ = 7289856.

The previous prime is 18480647. The next prime is 18480691. The reversal of 18480680 is 8608481.

It can be written as a sum of positive squares in 4 ways, for example, as 16957924 + 1522756 = 4118^2 + 1234^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 18480680.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 245 + ... + 6084.

Almost surely, 2^18480680 is an apocalyptic number.

18480680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18480680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21078900).

18480680 is an abundant number, since it is smaller than the sum of its proper divisors (23677120).

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

18480680 is a wasteful number, since it uses less digits than its factorization.

18480680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6413 (or 6409 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 35.

The square root of 18480680 is about 4298.9161424713. The cubic root of 18480680 is about 264.3865244135.

The spelling of 18480680 in words is "eighteen million, four hundred eighty thousand, six hundred eighty".