16918980 has 96 divisors (see below), whose sum is σ = 51744000. Its totient is φ = 4105728.

The previous prime is 16918933. The next prime is 16918981. The reversal of 16918980 is 8981961.

It is not an unprimeable number, because it can be changed into a prime (16918981) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 84921 + ... + 85119.

It is an arithmetic number, because the mean of its divisors is an integer number (539000).

Almost surely, 2^16918980 is an apocalyptic number.

16918980 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 16918980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25872000).

16918980 is an abundant number, since it is smaller than the sum of its proper divisors (34825020).

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

16918980 is a wasteful number, since it uses less digits than its factorization.

16918980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333 (or 331 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 42.

The square root of 16918980 is about 4113.2687731292. The cubic root of 16918980 is about 256.7190275664.

The spelling of 16918980 in words is "sixteen million, nine hundred eighteen thousand, nine hundred eighty".