19979539002 has 32 divisors (see below), whose sum is σ = 45236698560. Its totient is φ = 6534187920.

The previous prime is 19979539001. The next prime is 19979539043. The reversal of 19979539002 is 20093597991.

19979539002 is a `hidden beast` number, since 19 + 97 + 9 + 539 + 0 + 0 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 19979539002.

It is not an unprimeable number, because it can be changed into a prime (19979539001) 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 15 ways as a sum of consecutive naturals, for example, 3487624 + ... + 3493347.

It is an arithmetic number, because the mean of its divisors is an integer number (1413646830).

Almost surely, 2^19979539002 is an apocalyptic number.

19979539002 is an abundant number, since it is smaller than the sum of its proper divisors (25257159558).

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

19979539002 is a wasteful number, since it uses less digits than its factorization.

19979539002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6981035 (or 6981029 counting only the distinct ones).

The product of its (nonzero) digits is 1377810, while the sum is 54.

The spelling of 19979539002 in words is "nineteen billion, nine hundred seventy-nine million, five hundred thirty-nine thousand, two".