20695674879 has 40 divisors (see below), whose sum is σ = 33763059792. Its totient is φ = 12529157760.

The previous prime is 20695674841. The next prime is 20695674889. The reversal of 20695674879 is 97847659602.

20695674879 is a `hidden beast` number, since 2 + 0 + 6 + 95 + 67 + 487 + 9 = 666.

It is not a de Polignac number, because 20695674879 - 2⁷ = 20695674751 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20695674889) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 836937 + ... + 861309.

Almost surely, 2^20695674879 is an apocalyptic number.

20695674879 is a deficient number, since it is larger than the sum of its proper divisors (13067384913).

20695674879 is a wasteful number, since it uses less digits than its factorization.

20695674879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25349 (or 25340 counting only the distinct ones).

The product of its (nonzero) digits is 45722880, while the sum is 63.

The spelling of 20695674879 in words is "twenty billion, six hundred ninety-five million, six hundred seventy-four thousand, eight hundred seventy-nine".