18168680 has 32 divisors (see below), whose sum is σ = 41013000. Its totient is φ = 7243776.

The previous prime is 18168677. The next prime is 18168691. The reversal of 18168680 is 8686181.

It can be written as a sum of positive squares in 4 ways, for example, as 14760964 + 3407716 = 3842^2 + 1846^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16796 + ... + 17844.

Almost surely, 2^18168680 is an apocalyptic number.

18168680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18168680 is an abundant number, since it is smaller than the sum of its proper divisors (22844320).

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

18168680 is a wasteful number, since it uses less digits than its factorization.

18168680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1493 (or 1489 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 38.

The square root of 18168680 is about 4262.4734603279. The cubic root of 18168680 is about 262.8902374165.

The spelling of 18168680 in words is "eighteen million, one hundred sixty-eight thousand, six hundred eighty".