20967613605 has 48 divisors (see below), whose sum is σ = 36910277040. Its totient is φ = 11009654784.

The previous prime is 20967613577. The next prime is 20967613607. The reversal of 20967613605 is 50631676902.

20967613605 is a `hidden beast` number, since 20 + 9 + 6 + 7 + 6 + 13 + 605 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 6551769249 + 14415844356 = 80943^2 + 120066^2 .

It is not a de Polignac number, because 20967613605 - 2⁵ = 20967613573 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20967613607) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 830001 + ... + 854889.

It is an arithmetic number, because the mean of its divisors is an integer number (768964105).

Almost surely, 2^20967613605 is an apocalyptic number.

It is an amenable number.

20967613605 is a deficient number, since it is larger than the sum of its proper divisors (15942663435).

20967613605 is a wasteful number, since it uses less digits than its factorization.

20967613605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25190 (or 25187 counting only the distinct ones).

The product of its (nonzero) digits is 408240, while the sum is 45.

The spelling of 20967613605 in words is "twenty billion, nine hundred sixty-seven million, six hundred thirteen thousand, six hundred five".