20568316607 has 4 divisors (see below), whose sum is σ = 20586633240. Its totient is φ = 20549999976.

The previous prime is 20568316603. The next prime is 20568316627. The reversal of 20568316607 is 70661386502.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20568316607 - 2² = 20568316603 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20568316603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9156632 + ... + 9158877.

It is an arithmetic number, because the mean of its divisors is an integer number (5146658310).

Almost surely, 2^20568316607 is an apocalyptic number.

20568316607 is a deficient number, since it is larger than the sum of its proper divisors (18316633).

20568316607 is a wasteful number, since it uses less digits than its factorization.

20568316607 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18316632.

The product of its (nonzero) digits is 362880, while the sum is 44.

The spelling of 20568316607 in words is "twenty billion, five hundred sixty-eight million, three hundred sixteen thousand, six hundred seven".