16918389824 has 28 divisors (see below), whose sum is σ = 38368492224. Its totient is φ = 7250738304.

The previous prime is 16918389821. The next prime is 16918389863. The reversal of 16918389824 is 42898381961.

It is a tau number, because it is divible by the number of its divisors (28).

It is not an unprimeable number, because it can be changed into a prime (16918389821) 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 3 ways as a sum of consecutive naturals, for example, 18881684 + ... + 18882579.

Almost surely, 2^16918389824 is an apocalyptic number.

16918389824 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

16918389824 is an abundant number, since it is smaller than the sum of its proper divisors (21450102400).

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

16918389824 is an equidigital number, since it uses as much as digits as its factorization.

16918389824 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37764282 (or 37764272 counting only the distinct ones).

The product of its digits is 5971968, while the sum is 59.

The spelling of 16918389824 in words is "sixteen billion, nine hundred eighteen million, three hundred eighty-nine thousand, eight hundred twenty-four".