19864935996 has 24 divisors (see below), whose sum is σ = 46440498384. Its totient is φ = 6608933760.

The previous prime is 19864935983. The next prime is 19864936027. The reversal of 19864935996 is 69953946891.

It is a self number, because there is not a number n which added to its sum of digits gives 19864935996.

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, 1582435 + ... + 1594938.

It is an arithmetic number, because the mean of its divisors is an integer number (1935020766).

Almost surely, 2^19864935996 is an apocalyptic number.

It is an amenable number.

19864935996 is an abundant number, since it is smaller than the sum of its proper divisors (26575562388).

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

19864935996 is a wasteful number, since it uses less digits than its factorization.

19864935996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3177901 (or 3177899 counting only the distinct ones).

The product of its digits is 113374080, while the sum is 69.

The spelling of 19864935996 in words is "nineteen billion, eight hundred sixty-four million, nine hundred thirty-five thousand, nine hundred ninety-six".