19897690933404 has 96 divisors (see below), whose sum is σ = 52354361875200. Its totient is φ = 6534580703040.

The previous prime is 19897690933387. The next prime is 19897690933409. The reversal of 19897690933404 is 40433909679891.

19897690933404 is a `hidden beast` number, since 19 + 8 + 97 + 6 + 90 + 9 + 33 + 404 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19897690933409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3092407 + ... + 7025550.

It is an arithmetic number, because the mean of its divisors is an integer number (545357936200).

Almost surely, 2^{19897690933404} is an apocalyptic number.

It is an amenable number.

19897690933404 is an abundant number, since it is smaller than the sum of its proper divisors (32456670941796).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19897690933404 is a wasteful number, since it uses less digits than its factorization.

19897690933404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10118240 (or 10118232 counting only the distinct ones).

The product of its (nonzero) digits is 317447424, while the sum is 72.

The spelling of 19897690933404 in words is "nineteen trillion, eight hundred ninety-seven billion, six hundred ninety million, nine hundred thirty-three thousand, four hundred four".