19838397328856 has 16 divisors (see below), whose sum is σ = 37197047850840. Its totient is φ = 9919184568640.

The previous prime is 19838397328847. The next prime is 19838397328901. The reversal of 19838397328856 is 65882379383891.

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, 6496295 + ... + 9048681.

Almost surely, 2^{19838397328856} is an apocalyptic number.

It is an amenable number.

19838397328856 is a deficient number, since it is larger than the sum of its proper divisors (17358650521984).

19838397328856 is a wasteful number, since it uses less digits than its factorization.

19838397328856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3523954 (or 3523950 counting only the distinct ones).

The product of its digits is 3762339840, while the sum is 80.

The spelling of 19838397328856 in words is "nineteen trillion, eight hundred thirty-eight billion, three hundred ninety-seven million, three hundred twenty-eight thousand, eight hundred fifty-six".