20928344960 has 64 divisors (see below), whose sum is σ = 52665109200. Its totient is φ = 7930736640.

The previous prime is 20928344951. The next prime is 20928345013. The reversal of 20928344960 is 6944382902.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 848381 + ... + 872700.

Almost surely, 2^20928344960 is an apocalyptic number.

20928344960 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20928344960 is an abundant number, since it is smaller than the sum of its proper divisors (31736764240).

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

20928344960 is a wasteful number, since it uses less digits than its factorization.

20928344960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1721119 (or 1721107 counting only the distinct ones).

The product of its (nonzero) digits is 746496, while the sum is 47.

The spelling of 20928344960 in words is "twenty billion, nine hundred twenty-eight million, three hundred forty-four thousand, nine hundred sixty".