19159979438 has 16 divisors (see below), whose sum is σ = 31004719920. Its totient is φ = 8846338176.

The previous prime is 19159979359. The next prime is 19159979459. The reversal of 19159979438 is 83497995191.

It is a congruent number.

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, 5314508 + ... + 5318111.

It is an arithmetic number, because the mean of its divisors is an integer number (1937794995).

Almost surely, 2^19159979438 is an apocalyptic number.

19159979438 is a deficient number, since it is larger than the sum of its proper divisors (11844740482).

19159979438 is a wasteful number, since it uses less digits than its factorization.

19159979438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10632691.

The product of its digits is 22044960, while the sum is 65.

The spelling of 19159979438 in words is "nineteen billion, one hundred fifty-nine million, nine hundred seventy-nine thousand, four hundred thirty-eight".