20708644472 has 16 divisors (see below), whose sum is σ = 38991175200. Its totient is φ = 10310997760.

The previous prime is 20708644421. The next prime is 20708644477. The reversal of 20708644472 is 27444680702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20708644477) 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 3 ways as a sum of consecutive naturals, for example, 5413529 + ... + 5417352.

It is an arithmetic number, because the mean of its divisors is an integer number (2436948450).

Almost surely, 2^20708644472 is an apocalyptic number.

It is an amenable number.

20708644472 is a deficient number, since it is larger than the sum of its proper divisors (18282530728).

20708644472 is a wasteful number, since it uses less digits than its factorization.

20708644472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10831126 (or 10831122 counting only the distinct ones).

The product of its (nonzero) digits is 602112, while the sum is 44.

The spelling of 20708644472 in words is "twenty billion, seven hundred eight million, six hundred forty-four thousand, four hundred seventy-two".