19346564842 has 16 divisors (see below), whose sum is σ = 33520252032. Its totient is φ = 8276605120.

The previous prime is 19346564813. The next prime is 19346564849. The reversal of 19346564842 is 24846564391.

It is a self number, because there is not a number n which added to its sum of digits gives 19346564842.

It is not an unprimeable number, because it can be changed into a prime (19346564849) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25864018 + ... + 25864765.

It is an arithmetic number, because the mean of its divisors is an integer number (2095015752).

Almost surely, 2^19346564842 is an apocalyptic number.

19346564842 is a deficient number, since it is larger than the sum of its proper divisors (14173687190).

19346564842 is a wasteful number, since it uses less digits than its factorization.

19346564842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51728813.

The product of its digits is 4976640, while the sum is 52.

The spelling of 19346564842 in words is "nineteen billion, three hundred forty-six million, five hundred sixty-four thousand, eight hundred forty-two".