18886980 has 96 divisors (see below), whose sum is σ = 61012224. Its totient is φ = 4276224.

The previous prime is 18886963. The next prime is 18887009. The reversal of 18886980 is 8968881.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 80944 + ... + 81176.

It is an arithmetic number, because the mean of its divisors is an integer number (635544).

Almost surely, 2^18886980 is an apocalyptic number.

18886980 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 18886980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30506112).

18886980 is an abundant number, since it is smaller than the sum of its proper divisors (42125244).

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

18886980 is a wasteful number, since it uses less digits than its factorization.

18886980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 445 (or 443 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 48.

The square root of 18886980 is about 4345.9153236114. The cubic root of 18886980 is about 266.3100197516.

The spelling of 18886980 in words is "eighteen million, eight hundred eighty-six thousand, nine hundred eighty".