19928948500 has 24 divisors (see below), whose sum is σ = 43524824616. Its totient is φ = 7971579200.

The previous prime is 19928948497. The next prime is 19928948521. The reversal of 19928948500 is 584982991.

It can be written as a sum of positive squares in 4 ways, for example, as 2010984336 + 17917964164 = 44844^2 + 133858^2 .

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 19928449 + ... + 19929448.

It is an arithmetic number, because the mean of its divisors is an integer number (1813534359).

Almost surely, 2^19928948500 is an apocalyptic number.

19928948500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19928948500 is an abundant number, since it is smaller than the sum of its proper divisors (23595876116).

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

19928948500 is a wasteful number, since it uses less digits than its factorization.

19928948500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39857916 (or 39857904 counting only the distinct ones).

The product of its (nonzero) digits is 1866240, while the sum is 55.

The spelling of 19928948500 in words is "nineteen billion, nine hundred twenty-eight million, nine hundred forty-eight thousand, five hundred".