19726130724 has 24 divisors (see below), whose sum is σ = 46130162400. Its totient is φ = 6560730624.

The previous prime is 19726130719. The next prime is 19726130747. The reversal of 19726130724 is 42703162791.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1825174 + ... + 1835949.

It is an arithmetic number, because the mean of its divisors is an integer number (1922090100).

Almost surely, 2^19726130724 is an apocalyptic number.

It is an amenable number.

19726130724 is an abundant number, since it is smaller than the sum of its proper divisors (26404031676).

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

19726130724 is a wasteful number, since it uses less digits than its factorization.

19726130724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3661579 (or 3661577 counting only the distinct ones).

The product of its (nonzero) digits is 127008, while the sum is 42.

The spelling of 19726130724 in words is "nineteen billion, seven hundred twenty-six million, one hundred thirty thousand, seven hundred twenty-four".