20760679685 has 4 divisors (see below), whose sum is σ = 24912815628. Its totient is φ = 16608543744.

The previous prime is 20760679673. The next prime is 20760679741. The reversal of 20760679685 is 58697606702.

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

It can be written as a sum of positive squares in 2 ways, for example, as 5562474724 + 15198204961 = 74582^2 + 123281^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20760679685 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 20760679685.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2076067964 + ... + 2076067973.

It is an arithmetic number, because the mean of its divisors is an integer number (6228203907).

Almost surely, 2^20760679685 is an apocalyptic number.

It is an amenable number.

20760679685 is a deficient number, since it is larger than the sum of its proper divisors (4152135943).

20760679685 is an equidigital number, since it uses as much as digits as its factorization.

20760679685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4152135942.

The product of its (nonzero) digits is 7620480, while the sum is 56.

The spelling of 20760679685 in words is "twenty billion, seven hundred sixty million, six hundred seventy-nine thousand, six hundred eighty-five".