19879006939 has 16 divisors (see below), whose sum is σ = 22072176000. Its totient is φ = 17750681920.

The previous prime is 19879006919. The next prime is 19879006949. The reversal of 19879006939 is 93960097891.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19879006939 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19879006919) 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, 804927 + ... + 829255.

It is an arithmetic number, because the mean of its divisors is an integer number (1379511000).

Almost surely, 2^19879006939 is an apocalyptic number.

19879006939 is a deficient number, since it is larger than the sum of its proper divisors (2193169061).

19879006939 is a wasteful number, since it uses less digits than its factorization.

19879006939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25658.

The product of its (nonzero) digits is 6613488, while the sum is 61.

The spelling of 19879006939 in words is "nineteen billion, eight hundred seventy-nine million, six thousand, nine hundred thirty-nine".