19678810384 has 40 divisors (see below), whose sum is σ = 38248355520. Its totient is φ = 9808326528.

The previous prime is 19678810357. The next prime is 19678810387. The reversal of 19678810384 is 48301887691.

It is a Smith number, since the sum of its digits (55) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (19678810387) 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, 8891262 + ... + 8893474.

It is an arithmetic number, because the mean of its divisors is an integer number (956208888).

Almost surely, 2^19678810384 is an apocalyptic number.

It is an amenable number.

19678810384 is a deficient number, since it is larger than the sum of its proper divisors (18569545136).

19678810384 is a wasteful number, since it uses less digits than its factorization.

19678810384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3727 (or 3721 counting only the distinct ones).

The product of its (nonzero) digits is 2322432, while the sum is 55.

The spelling of 19678810384 in words is "nineteen billion, six hundred seventy-eight million, eight hundred ten thousand, three hundred eighty-four".