18016680 has 64 divisors (see below), whose sum is σ = 58968000. Its totient is φ = 4367360.

The previous prime is 18016667. The next prime is 18016681. The reversal of 18016680 is 8661081.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (18016681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5505 + ... + 8144.

It is an arithmetic number, because the mean of its divisors is an integer number (921375).

Almost surely, 2^18016680 is an apocalyptic number.

18016680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18016680 is an abundant number, since it is smaller than the sum of its proper divisors (40951320).

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

18016680 is a wasteful number, since it uses less digits than its factorization.

18016680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13674 (or 13670 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 30.

The square root of 18016680 is about 4244.6059887815. The cubic root of 18016680 is about 262.1550662184.

The spelling of 18016680 in words is "eighteen million, sixteen thousand, six hundred eighty".