19827664894 has 16 divisors (see below), whose sum is σ = 29797204320. Its totient is φ = 9895279840.

The previous prime is 19827664891. The next prime is 19827664933. The reversal of 19827664894 is 49846672891.

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 7 ways as a sum of consecutive naturals, for example, 4235247 + ... + 4239925.

It is an arithmetic number, because the mean of its divisors is an integer number (1862325270).

Almost surely, 2^19827664894 is an apocalyptic number.

19827664894 is a deficient number, since it is larger than the sum of its proper divisors (9969539426).

19827664894 is a wasteful number, since it uses less digits than its factorization.

19827664894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8195.

The product of its digits is 41803776, while the sum is 64.

The spelling of 19827664894 in words is "nineteen billion, eight hundred twenty-seven million, six hundred sixty-four thousand, eight hundred ninety-four".