18680896 has 28 divisors (see below), whose sum is σ = 39923212. Its totient is φ = 8621568.

The previous prime is 18680891. The next prime is 18680897. The reversal of 18680896 is 69808681.

It can be written as a sum of positive squares in 2 ways, for example, as 2359296 + 16321600 = 1536^2 + 4040^2 .

It is not an unprimeable number, because it can be changed into a prime (18680891) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10395 + ... + 12058.

It is an arithmetic number, because the mean of its divisors is an integer number (1425829).

Almost surely, 2^18680896 is an apocalyptic number.

18680896 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

18680896 is an abundant number, since it is smaller than the sum of its proper divisors (21242316).

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

18680896 is a wasteful number, since it uses less digits than its factorization.

18680896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22478 (or 22468 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 46.

The square root of 18680896 is about 4322.1402105901. The cubic root of 18680896 is about 265.3378673726.

The spelling of 18680896 in words is "eighteen million, six hundred eighty thousand, eight hundred ninety-six".