19804865013044 has 96 divisors (see below), whose sum is σ = 38388820377600. Its totient is φ = 8904336480000.

The previous prime is 19804865012963. The next prime is 19804865013077. The reversal of 19804865013044 is 44031056840891.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 27752384 + ... + 28457064.

It is an arithmetic number, because the mean of its divisors is an integer number (399883545600).

Almost surely, 2^{19804865013044} is an apocalyptic number.

It is an amenable number.

19804865013044 is a deficient number, since it is larger than the sum of its proper divisors (18583955364556).

19804865013044 is a wasteful number, since it uses less digits than its factorization.

19804865013044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 704965 (or 704963 counting only the distinct ones).

The product of its (nonzero) digits is 3317760, while the sum is 53.

The spelling of 19804865013044 in words is "nineteen trillion, eight hundred four billion, eight hundred sixty-five million, thirteen thousand, forty-four".