16718980 has 24 divisors (see below), whose sum is σ = 35967960. Its totient is φ = 6524160.

The previous prime is 16718963. The next prime is 16718983. The reversal of 16718980 is 8981761.

It can be written as a sum of positive squares in 4 ways, for example, as 1726596 + 14992384 = 1314^2 + 3872^2 .

It is not an unprimeable number, because it can be changed into a prime (16718983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9375 + ... + 11014.

It is an arithmetic number, because the mean of its divisors is an integer number (1498665).

Almost surely, 2^16718980 is an apocalyptic number.

16718980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16718980 is an abundant number, since it is smaller than the sum of its proper divisors (19248980).

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

16718980 is a wasteful number, since it uses less digits than its factorization.

16718980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20439 (or 20437 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 40.

The square root of 16718980 is about 4088.8849335730. The cubic root of 16718980 is about 255.7034530033.

The spelling of 16718980 in words is "sixteen million, seven hundred eighteen thousand, nine hundred eighty".