20928589188 has 48 divisors (see below), whose sum is σ = 52727248896. Its totient is φ = 6422734080.

The previous prime is 20928589169. The next prime is 20928589217. The reversal of 20928589188 is 88198582902.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 115393 + ... + 234888.

It is an arithmetic number, because the mean of its divisors is an integer number (1098484352).

Almost surely, 2^20928589188 is an apocalyptic number.

It is an amenable number.

20928589188 is an abundant number, since it is smaller than the sum of its proper divisors (31798659708).

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

20928589188 is a wasteful number, since it uses less digits than its factorization.

20928589188 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 350684 (or 350682 counting only the distinct ones).

The product of its (nonzero) digits is 6635520, while the sum is 60.

The spelling of 20928589188 in words is "twenty billion, nine hundred twenty-eight million, five hundred eighty-nine thousand, one hundred eighty-eight".