19879970539 has 8 divisors (see below), whose sum is σ = 23355490032. Its totient is φ = 16682492640.

The previous prime is 19879970531. The next prime is 19879970543. The reversal of 19879970539 is 93507997891.

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

It is not a de Polignac number, because 19879970539 - 2³ = 19879970531 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19879970531) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69510244 + ... + 69510529.

It is an arithmetic number, because the mean of its divisors is an integer number (2919436254).

Almost surely, 2^19879970539 is an apocalyptic number.

19879970539 is a deficient number, since it is larger than the sum of its proper divisors (3475519493).

19879970539 is a wasteful number, since it uses less digits than its factorization.

19879970539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139020797.

The product of its (nonzero) digits is 38578680, while the sum is 67.

The spelling of 19879970539 in words is "nineteen billion, eight hundred seventy-nine million, nine hundred seventy thousand, five hundred thirty-nine".