19678686312 has 64 divisors (see below), whose sum is σ = 50149972800. Its totient is φ = 6433320960.

The previous prime is 19678686301. The next prime is 19678686317. The reversal of 19678686312 is 21368687691.

It is a super-2 number, since 2×19678686312² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (19678686317) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 341512 + ... + 394952.

It is an arithmetic number, because the mean of its divisors is an integer number (783593325).

Almost surely, 2^19678686312 is an apocalyptic number.

19678686312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

19678686312 is an abundant number, since it is smaller than the sum of its proper divisors (30471286488).

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

19678686312 is a wasteful number, since it uses less digits than its factorization.

19678686312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53746 (or 53742 counting only the distinct ones).

The product of its digits is 5225472, while the sum is 57.

The spelling of 19678686312 in words is "nineteen billion, six hundred seventy-eight million, six hundred eighty-six thousand, three hundred twelve".