19983139378 has 8 divisors (see below), whose sum is σ = 29982504240. Its totient is φ = 9988971300.

The previous prime is 19983139331. The next prime is 19983139387. The reversal of 19983139378 is 87393138991.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1289568 + ... + 1304971.

It is an arithmetic number, because the mean of its divisors is an integer number (3747813030).

Almost surely, 2^19983139378 is an apocalyptic number.

19983139378 is a deficient number, since it is larger than the sum of its proper divisors (9999364862).

19983139378 is a wasteful number, since it uses less digits than its factorization.

19983139378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2598392.

The product of its digits is 8817984, while the sum is 61.

The spelling of 19983139378 in words is "nineteen billion, nine hundred eighty-three million, one hundred thirty-nine thousand, three hundred seventy-eight".