16519983818 has 64 divisors (see below), whose sum is σ = 29594460672. Its totient is φ = 6838487040.

The previous prime is 16519983817. The next prime is 16519983829. The reversal of 16519983818 is 81838991561.

It is not an unprimeable number, because it can be changed into a prime (16519983817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2853755 + ... + 2859537.

It is an arithmetic number, because the mean of its divisors is an integer number (462413448).

Almost surely, 2^16519983818 is an apocalyptic number.

16519983818 is a deficient number, since it is larger than the sum of its proper divisors (13074476854).

16519983818 is a wasteful number, since it uses less digits than its factorization.

16519983818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6119.

The product of its digits is 3732480, while the sum is 59.

The spelling of 16519983818 in words is "sixteen billion, five hundred nineteen million, nine hundred eighty-three thousand, eight hundred eighteen".