19827804573 has 6 divisors (see below), whose sum is σ = 28640162174. Its totient is φ = 13218536376.

The previous prime is 19827804541. The next prime is 19827804587. The reversal of 19827804573 is 37540872891.

It is a happy number.

19827804573 is a `hidden beast` number, since 1 + 98 + 27 + 80 + 457 + 3 = 666.

It can be written as a sum of positive squares in only one way, i.e., 16890381369 + 2937423204 = 129963^2 + 54198^2 .

It is not a de Polignac number, because 19827804573 - 2⁵ = 19827804541 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19827804523) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1101544690 + ... + 1101544707.

Almost surely, 2^19827804573 is an apocalyptic number.

It is an amenable number.

19827804573 is a deficient number, since it is larger than the sum of its proper divisors (8812357601).

19827804573 is a wasteful number, since it uses less digits than its factorization.

19827804573 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2203089403 (or 2203089400 counting only the distinct ones).

The product of its (nonzero) digits is 3386880, while the sum is 54.

The spelling of 19827804573 in words is "nineteen billion, eight hundred twenty-seven million, eight hundred four thousand, five hundred seventy-three".