19873335720 has 96 divisors (see below), whose sum is σ = 69353906400. Its totient is φ = 4542475392.

The previous prime is 19873335719. The next prime is 19873335739. The reversal of 19873335720 is 2753337891.

It is a self number, because there is not a number n which added to its sum of digits gives 19873335720.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1684030 + ... + 1695789.

It is an arithmetic number, because the mean of its divisors is an integer number (722436525).

Almost surely, 2^19873335720 is an apocalyptic number.

19873335720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19873335720 is an abundant number, since it is smaller than the sum of its proper divisors (49480570680).

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

19873335720 is a wasteful number, since it uses less digits than its factorization.

19873335720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3379847 (or 3379836 counting only the distinct ones).

The product of its (nonzero) digits is 952560, while the sum is 48.

The spelling of 19873335720 in words is "nineteen billion, eight hundred seventy-three million, three hundred thirty-five thousand, seven hundred twenty".