20939448888 has 64 divisors (see below), whose sum is σ = 58708800000. Its totient is φ = 6914576736.

The previous prime is 20939448857. The next prime is 20939448889. The reversal of 20939448888 is 88884493902.

20939448888 is a `hidden beast` number, since 20 + 93 + 9 + 448 + 8 + 88 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20939448889) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 429888 + ... + 476111.

It is an arithmetic number, because the mean of its divisors is an integer number (917325000).

Almost surely, 2^20939448888 is an apocalyptic number.

It is an amenable number.

20939448888 is an abundant number, since it is smaller than the sum of its proper divisors (37769351112).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20939448888 is a wasteful number, since it uses less digits than its factorization.

20939448888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 906121 (or 906111 counting only the distinct ones).

The product of its (nonzero) digits is 31850496, while the sum is 63.

The spelling of 20939448888 in words is "twenty billion, nine hundred thirty-nine million, four hundred forty-eight thousand, eight hundred eighty-eight".