19397634442 has 8 divisors (see below), whose sum is σ = 29133425376. Its totient is φ = 9686492652.

The previous prime is 19397634419. The next prime is 19397634479. The reversal of 19397634442 is 24443679391.

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

It is a self number, because there is not a number n which added to its sum of digits gives 19397634442.

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, 6160318 + ... + 6163465.

It is an arithmetic number, because the mean of its divisors is an integer number (3641678172).

Almost surely, 2^19397634442 is an apocalyptic number.

19397634442 is a deficient number, since it is larger than the sum of its proper divisors (9735790934).

19397634442 is a wasteful number, since it uses less digits than its factorization.

19397634442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12324572.

The product of its digits is 3919104, while the sum is 52.

The spelling of 19397634442 in words is "nineteen billion, three hundred ninety-seven million, six hundred thirty-four thousand, four hundred forty-two".