16818804720 has 60 divisors (see below), whose sum is σ = 56483154936. Its totient is φ = 4485014400.

The previous prime is 16818804689. The next prime is 16818804721. The reversal of 16818804720 is 2740881861.

16818804720 is a `hidden beast` number, since 168 + 18 + 8 + 0 + 472 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (60).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16818804721) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11679006 + ... + 11680445.

Almost surely, 2^16818804720 is an apocalyptic number.

16818804720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16818804720 is an abundant number, since it is smaller than the sum of its proper divisors (39664350216).

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

16818804720 is a wasteful number, since it uses less digits than its factorization.

16818804720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23359470 (or 23359461 counting only the distinct ones).

The product of its (nonzero) digits is 172032, while the sum is 45.

The spelling of 16818804720 in words is "sixteen billion, eight hundred eighteen million, eight hundred four thousand, seven hundred twenty".