19454134378 has 16 divisors (see below), whose sum is σ = 33369966720. Its totient is φ = 8332480656.

The previous prime is 19454134303. The next prime is 19454134393. The reversal of 19454134378 is 87343145491.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 392926 + ... + 439657.

It is an arithmetic number, because the mean of its divisors is an integer number (2085622920).

Almost surely, 2^19454134378 is an apocalyptic number.

19454134378 is a deficient number, since it is larger than the sum of its proper divisors (13915832342).

19454134378 is a wasteful number, since it uses less digits than its factorization.

19454134378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 834261.

The product of its digits is 1451520, while the sum is 49.

The spelling of 19454134378 in words is "nineteen billion, four hundred fifty-four million, one hundred thirty-four thousand, three hundred seventy-eight".