20680008068 has 12 divisors (see below), whose sum is σ = 36454175772. Its totient is φ = 10264529280.

The previous prime is 20680008061. The next prime is 20680008091. The reversal of 20680008068 is 86080008602.

It can be written as a sum of positive squares in 2 ways, for example, as 10848888964 + 9831119104 = 104158^2 + 99152^2 .

It is not an unprimeable number, because it can be changed into a prime (20680008061) 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, 18868073 + ... + 18869168.

It is an arithmetic number, because the mean of its divisors is an integer number (3037847981).

Almost surely, 2^20680008068 is an apocalyptic number.

It is an amenable number.

20680008068 is a deficient number, since it is larger than the sum of its proper divisors (15774167704).

20680008068 is a wasteful number, since it uses less digits than its factorization.

20680008068 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37737382 (or 37737380 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 38.

The spelling of 20680008068 in words is "twenty billion, six hundred eighty million, eight thousand, sixty-eight".