18806560 has 24 divisors (see below), whose sum is σ = 44430876. Its totient is φ = 7522560.

The previous prime is 18806549. The next prime is 18806569. The reversal of 18806560 is 6560881.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 16744464 + 2062096 = 4092^2 + 1436^2 .

It is a Smith number, since the sum of its digits (34) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (18806569) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 58611 + ... + 58930.

Almost surely, 2^18806560 is an apocalyptic number.

18806560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18806560 is an abundant number, since it is smaller than the sum of its proper divisors (25624316).

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

18806560 is a wasteful number, since it uses less digits than its factorization.

18806560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117556 (or 117548 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 34.

The square root of 18806560 is about 4336.6530873474. The cubic root of 18806560 is about 265.9315028936.

The spelling of 18806560 in words is "eighteen million, eight hundred six thousand, five hundred sixty".