19868487036 has 24 divisors (see below), whose sum is σ = 48799793280. Its totient is φ = 6274258992.

The previous prime is 19868487031. The next prime is 19868487043. The reversal of 19868487036 is 63078486891.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19868487031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43571016 + ... + 43571471.

It is an arithmetic number, because the mean of its divisors is an integer number (2033324720).

Almost surely, 2^19868487036 is an apocalyptic number.

It is an amenable number.

19868487036 is an abundant number, since it is smaller than the sum of its proper divisors (28931306244).

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

19868487036 is a wasteful number, since it uses less digits than its factorization.

19868487036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87142513 (or 87142511 counting only the distinct ones).

The product of its (nonzero) digits is 13934592, while the sum is 60.

The spelling of 19868487036 in words is "nineteen billion, eight hundred sixty-eight million, four hundred eighty-seven thousand, thirty-six".