19763844864 has 72 divisors (see below), whose sum is σ = 52621390080. Its totient is φ = 6585351168.

The previous prime is 19763844851. The next prime is 19763844883. The reversal of 19763844864 is 46844836791.

It is a junction number, because it is equal to n+sod(n) for n = 19763844798 and 19763844807.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3867399 + ... + 3872505.

It is an arithmetic number, because the mean of its divisors is an integer number (730852640).

Almost surely, 2^19763844864 is an apocalyptic number.

It is an amenable number.

19763844864 is an abundant number, since it is smaller than the sum of its proper divisors (32857545216).

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

19763844864 is an equidigital number, since it uses as much as digits as its factorization.

19763844864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10165 (or 10151 counting only the distinct ones).

The product of its digits is 27869184, while the sum is 60.

The spelling of 19763844864 in words is "nineteen billion, seven hundred sixty-three million, eight hundred forty-four thousand, eight hundred sixty-four".