19727608434 has 32 divisors (see below), whose sum is σ = 39651600384. Its totient is φ = 6543198480.

The previous prime is 19727608429. The next prime is 19727608447. The reversal of 19727608434 is 43480672791.

19727608434 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1430697 + ... + 1444419.

It is an arithmetic number, because the mean of its divisors is an integer number (1239112512).

Almost surely, 2^19727608434 is an apocalyptic number.

19727608434 is an abundant number, since it is smaller than the sum of its proper divisors (19923991950).

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

19727608434 is a wasteful number, since it uses less digits than its factorization.

19727608434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14902.

The product of its (nonzero) digits is 2032128, while the sum is 51.

The spelling of 19727608434 in words is "nineteen billion, seven hundred twenty-seven million, six hundred eight thousand, four hundred thirty-four".