18856680 has 128 divisors (see below), whose sum is σ = 60410880. Its totient is φ = 4700160.

The previous prime is 18856667. The next prime is 18856693. The reversal of 18856680 is 8665881.

It is an interprime number because it is at equal distance from previous prime (18856667) and next prime (18856693).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 137572 + ... + 137708.

It is an arithmetic number, because the mean of its divisors is an integer number (471960).

Almost surely, 2^18856680 is an apocalyptic number.

18856680 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 18856680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30205440).

18856680 is an abundant number, since it is smaller than the sum of its proper divisors (41554200).

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

18856680 is a wasteful number, since it uses less digits than its factorization.

18856680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219 (or 215 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 42.

The square root of 18856680 is about 4342.4278923201. The cubic root of 18856680 is about 266.1675316014.

The spelling of 18856680 in words is "eighteen million, eight hundred fifty-six thousand, six hundred eighty".