19928975563 has 12 divisors (see below), whose sum is σ = 23185281240. Its totient is φ = 17080066752.

The previous prime is 19928975491. The next prime is 19928975567. The reversal of 19928975563 is 36557982991.

It is not a de Polignac number, because 19928975563 - 2¹³ = 19928967371 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 19928975495 and 19928975504.

It is not an unprimeable number, because it can be changed into a prime (19928975567) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 581283 + ... + 614611.

It is an arithmetic number, because the mean of its divisors is an integer number (1932106770).

Almost surely, 2^19928975563 is an apocalyptic number.

19928975563 is a deficient number, since it is larger than the sum of its proper divisors (3256305677).

19928975563 is a wasteful number, since it uses less digits than its factorization.

19928975563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45546 (or 45539 counting only the distinct ones).

The product of its digits is 36741600, while the sum is 64.

The spelling of 19928975563 in words is "nineteen billion, nine hundred twenty-eight million, nine hundred seventy-five thousand, five hundred sixty-three".