19678055418 has 24 divisors (see below), whose sum is σ = 48726613728. Its totient is φ = 5622301512.

The previous prime is 19678055401. The next prime is 19678055429. The reversal of 19678055418 is 81455087691.

It is a happy number.

19678055418 is a `hidden beast` number, since 1 + 9 + 6 + 7 + 80 + 554 + 1 + 8 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 78087396 + ... + 78087647.

It is an arithmetic number, because the mean of its divisors is an integer number (2030275572).

Almost surely, 2^19678055418 is an apocalyptic number.

19678055418 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

19678055418 is an abundant number, since it is smaller than the sum of its proper divisors (29048558310).

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

19678055418 is a wasteful number, since it uses less digits than its factorization.

19678055418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156175058 (or 156175055 counting only the distinct ones).

The product of its (nonzero) digits is 2419200, while the sum is 54.

The spelling of 19678055418 in words is "nineteen billion, six hundred seventy-eight million, fifty-five thousand, four hundred eighteen".