19728925800 has 48 divisors (see below), whose sum is σ = 61159671840. Its totient is φ = 5261046720.

The previous prime is 19728925757. The next prime is 19728925831. The reversal of 19728925800 is 852982791.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16440172 + ... + 16441371.

It is an arithmetic number, because the mean of its divisors is an integer number (1274159830).

Almost surely, 2^19728925800 is an apocalyptic number.

19728925800 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19728925800 is an abundant number, since it is smaller than the sum of its proper divisors (41430746040).

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

19728925800 is a wasteful number, since it uses less digits than its factorization.

19728925800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32881562 (or 32881553 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 51.

The spelling of 19728925800 in words is "nineteen billion, seven hundred twenty-eight million, nine hundred twenty-five thousand, eight hundred".