19979539060 has 96 divisors (see below), whose sum is σ = 46882547712. Its totient is φ = 7102287360.

The previous prime is 19979539043. The next prime is 19979539061. The reversal of 19979539060 is 6093597991.

It is a junction number, because it is equal to n+sod(n) for n = 19979538986 and 19979539004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19979539061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1581529 + ... + 1594111.

It is an arithmetic number, because the mean of its divisors is an integer number (488359872).

Almost surely, 2^19979539060 is an apocalyptic number.

19979539060 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19979539060, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23441273856).

19979539060 is an abundant number, since it is smaller than the sum of its proper divisors (26903008652).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19979539060 is a wasteful number, since it uses less digits than its factorization.

19979539060 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12833 (or 12831 counting only the distinct ones).

The product of its (nonzero) digits is 4133430, while the sum is 58.

The spelling of 19979539060 in words is "nineteen billion, nine hundred seventy-nine million, five hundred thirty-nine thousand, sixty".