16221999986 has 16 divisors (see below), whose sum is σ = 24950789208. Its totient is φ = 7907424000.

The previous prime is 16221999973. The next prime is 16222000009. The reversal of 16221999986 is 68999912261.

16221999986 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 2399530225 + 13822469761 = 48985^2 + 117569^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 574565 + ... + 602136.

Almost surely, 2^16221999986 is an apocalyptic number.

16221999986 is a deficient number, since it is larger than the sum of its proper divisors (8728789222).

16221999986 is a wasteful number, since it uses less digits than its factorization.

16221999986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1176877.

The product of its digits is 7558272, while the sum is 62.

The spelling of 16221999986 in words is "sixteen billion, two hundred twenty-one million, nine hundred ninety-nine thousand, nine hundred eighty-six".