19543641708 has 48 divisors (see below), whose sum is σ = 47708043264. Its totient is φ = 6220421760.

The previous prime is 19543641707. The next prime is 19543641713. The reversal of 19543641708 is 80714634591.

It is not an unprimeable number, because it can be changed into a prime (19543641707) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 399460 + ... + 445707.

It is an arithmetic number, because the mean of its divisors is an integer number (993917568).

Almost surely, 2^19543641708 is an apocalyptic number.

It is an amenable number.

19543641708 is an abundant number, since it is smaller than the sum of its proper divisors (28164401556).

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

19543641708 is a wasteful number, since it uses less digits than its factorization.

19543641708 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 845262 (or 845260 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 48.

The spelling of 19543641708 in words is "nineteen billion, five hundred forty-three million, six hundred forty-one thousand, seven hundred eight".