20679848613 has 20 divisors (see below), whose sum is σ = 31549404480. Its totient is φ = 13493232072.

The previous prime is 20679848551. The next prime is 20679848639. The reversal of 20679848613 is 31684897602.

20679848613 is a `hidden beast` number, since 2 + 0 + 67 + 98 + 486 + 13 = 666.

It is not a de Polignac number, because 20679848613 - 2⁶ = 20679848549 is a prime.

It is a super-2 number, since 2×20679848613² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20679848613.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20679848663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 2712223 + ... + 2719836.

It is an arithmetic number, because the mean of its divisors is an integer number (1577470224).

Almost surely, 2^20679848613 is an apocalyptic number.

It is an amenable number.

20679848613 is a deficient number, since it is larger than the sum of its proper divisors (10869555867).

20679848613 is an equidigital number, since it uses as much as digits as its factorization.

20679848613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5432118 (or 5432109 counting only the distinct ones).

The product of its (nonzero) digits is 3483648, while the sum is 54.

The spelling of 20679848613 in words is "twenty billion, six hundred seventy-nine million, eight hundred forty-eight thousand, six hundred thirteen".