19409443718894 has 8 divisors (see below), whose sum is σ = 29114433147360. Its totient is φ = 9704632669776.

The previous prime is 19409443718857. The next prime is 19409443719019. The reversal of 19409443718894 is 49881734490491.

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

It is a congruent number.

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, 44322479 + ... + 44758250.

It is an arithmetic number, because the mean of its divisors is an integer number (3639304143420).

Almost surely, 2^{19409443718894} is an apocalyptic number.

19409443718894 is a deficient number, since it is larger than the sum of its proper divisors (9704989428466).

19409443718894 is a wasteful number, since it uses less digits than its factorization.

19409443718894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89189674.

The product of its (nonzero) digits is 250822656, while the sum is 71.

The spelling of 19409443718894 in words is "nineteen trillion, four hundred nine billion, four hundred forty-three million, seven hundred eighteen thousand, eight hundred ninety-four".