19725398934 has 8 divisors (see below), whose sum is σ = 39450797880. Its totient is φ = 6575132976.

The previous prime is 19725398899. The next prime is 19725398941. The reversal of 19725398934 is 43989352791.

19725398934 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

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

19725398934 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1643783239 + ... + 1643783250.

It is an arithmetic number, because the mean of its divisors is an integer number (4931349735).

Almost surely, 2^19725398934 is an apocalyptic number.

19725398934 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

19725398934 is a wasteful number, since it uses less digits than its factorization.

19725398934 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3287566494.

The product of its digits is 14696640, while the sum is 60.

The spelling of 19725398934 in words is "nineteen billion, seven hundred twenty-five million, three hundred ninety-eight thousand, nine hundred thirty-four".