20691516682 has 16 divisors (see below), whose sum is σ = 31492955520. Its totient is φ = 10194139872.

The previous prime is 20691516673. The next prime is 20691516689. The reversal of 20691516682 is 28661519602.

It is not an unprimeable number, because it can be changed into a prime (20691516689) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 83493 + ... + 219895.

It is an arithmetic number, because the mean of its divisors is an integer number (1968309720).

Almost surely, 2^20691516682 is an apocalyptic number.

20691516682 is a deficient number, since it is larger than the sum of its proper divisors (10801438838).

20691516682 is a wasteful number, since it uses less digits than its factorization.

20691516682 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137517.

The product of its (nonzero) digits is 311040, while the sum is 46.

The spelling of 20691516682 in words is "twenty billion, six hundred ninety-one million, five hundred sixteen thousand, six hundred eighty-two".