19565404842 has 8 divisors (see below), whose sum is σ = 39130809696. Its totient is φ = 6521801612.

The previous prime is 19565404811. The next prime is 19565404879. The reversal of 19565404842 is 24840456591.

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

19565404842 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 19565404791 and 19565404800.

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, 1630450398 + ... + 1630450409.

It is an arithmetic number, because the mean of its divisors is an integer number (4891351212).

Almost surely, 2^19565404842 is an apocalyptic number.

19565404842 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.

19565404842 is a wasteful number, since it uses less digits than its factorization.

19565404842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3260900812.

The product of its (nonzero) digits is 1382400, while the sum is 48.

The spelling of 19565404842 in words is "nineteen billion, five hundred sixty-five million, four hundred four thousand, eight hundred forty-two".