20881684576 has 24 divisors (see below), whose sum is σ = 41198877720. Its totient is φ = 10418477568.

The previous prime is 20881684507. The next prime is 20881684609. The reversal of 20881684576 is 67548618802.

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, 683721 + ... + 713608.

It is an arithmetic number, because the mean of its divisors is an integer number (1716619905).

Almost surely, 2^20881684576 is an apocalyptic number.

It is an amenable number.

20881684576 is a deficient number, since it is larger than the sum of its proper divisors (20317193144).

20881684576 is a wasteful number, since it uses less digits than its factorization.

20881684576 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1397806 (or 1397798 counting only the distinct ones).

The product of its (nonzero) digits is 5160960, while the sum is 55.

It can be divided in two parts, 208816 and 84576, that added together give a palindrome (293392).

The spelling of 20881684576 in words is "twenty billion, eight hundred eighty-one million, six hundred eighty-four thousand, five hundred seventy-six".