19803039864 has 64 divisors (see below), whose sum is σ = 52129612800. Its totient is φ = 6251629824.

The previous prime is 19803039857. The next prime is 19803039871. The reversal of 19803039864 is 46893030891.

It is an interprime number because it is at equal distance from previous prime (19803039857) and next prime (19803039871).

It is a super-3 number, since 3×19803039864³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2315404 + ... + 2323940.

It is an arithmetic number, because the mean of its divisors is an integer number (814525200).

Almost surely, 2^19803039864 is an apocalyptic number.

It is an amenable number.

19803039864 is an abundant number, since it is smaller than the sum of its proper divisors (32326572936).

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

19803039864 is a wasteful number, since it uses less digits than its factorization.

19803039864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13652 (or 13648 counting only the distinct ones).

The product of its (nonzero) digits is 1119744, while the sum is 51.

The spelling of 19803039864 in words is "nineteen billion, eight hundred three million, thirty-nine thousand, eight hundred sixty-four".