20691708116 has 12 divisors (see below), whose sum is σ = 36368615220. Its totient is φ = 10300675200.

The previous prime is 20691708113. The next prime is 20691708119. The reversal of 20691708116 is 61180719602.

It is an interprime number because it is at equal distance from previous prime (20691708113) and next prime (20691708119).

It can be written as a sum of positive squares in 2 ways, for example, as 7876562500 + 12815145616 = 88750^2 + 113204^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20691708113) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11293685 + ... + 11295516.

It is an arithmetic number, because the mean of its divisors is an integer number (3030717935).

Almost surely, 2^20691708116 is an apocalyptic number.

It is an amenable number.

20691708116 is a deficient number, since it is larger than the sum of its proper divisors (15676907104).

20691708116 is a wasteful number, since it uses less digits than its factorization.

20691708116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22589434 (or 22589432 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 41.

The spelling of 20691708116 in words is "twenty billion, six hundred ninety-one million, seven hundred eight thousand, one hundred sixteen".