19827664893 has 72 divisors (see below), whose sum is σ = 31640648000. Its totient is φ = 12268827648.

The previous prime is 19827664891. The next prime is 19827664933. The reversal of 19827664893 is 39846672891.

19827664893 is a `hidden beast` number, since 1 + 9 + 82 + 76 + 6 + 489 + 3 = 666.

It is not a de Polignac number, because 19827664893 - 2¹ = 19827664891 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 19827664893.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19827664891) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 99636408 + ... + 99636606.

Almost surely, 2^19827664893 is an apocalyptic number.

It is an amenable number.

19827664893 is a deficient number, since it is larger than the sum of its proper divisors (11812983107).

19827664893 is a wasteful number, since it uses less digits than its factorization.

19827664893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 468 (or 332 counting only the distinct ones).

The product of its digits is 31352832, while the sum is 63.

It can be divided in two parts, 198276 and 64893, that added together give a square (263169 = 513²).

The spelling of 19827664893 in words is "nineteen billion, eight hundred twenty-seven million, six hundred sixty-four thousand, eight hundred ninety-three".