19558530945 has 40 divisors (see below), whose sum is σ = 35292776640. Its totient is φ = 10362103200.

The previous prime is 19558530917. The next prime is 19558530947. The reversal of 19558530945 is 54903585591.

19558530945 is a `hidden beast` number, since 19 + 5 + 5 + 8 + 530 + 94 + 5 = 666.

It is not a de Polignac number, because 19558530945 - 2³⁰ = 18484789121 is a prime.

It is a super-2 number, since 2×19558530945² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 19558530891 and 19558530900.

It is not an unprimeable number, because it can be changed into a prime (19558530947) 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 39 ways as a sum of consecutive naturals, for example, 98755 + ... + 221064.

It is an arithmetic number, because the mean of its divisors is an integer number (882319416).

Almost surely, 2^19558530945 is an apocalyptic number.

19558530945 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

19558530945 is a deficient number, since it is larger than the sum of its proper divisors (15734245695).

19558530945 is a wasteful number, since it uses less digits than its factorization.

19558530945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 319987 (or 319978 counting only the distinct ones).

The product of its (nonzero) digits is 4860000, while the sum is 54.

The spelling of 19558530945 in words is "nineteen billion, five hundred fifty-eight million, five hundred thirty thousand, nine hundred forty-five".