19585056558 has 32 divisors (see below), whose sum is σ = 40987579392. Its totient is φ = 6231211200.

The previous prime is 19585056479. The next prime is 19585056563. The reversal of 19585056558 is 85565058591.

It is a junction number, because it is equal to n+sod(n) for n = 19585056498 and 19585056507.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 707628 + ... + 734783.

It is an arithmetic number, because the mean of its divisors is an integer number (1280861856).

Almost surely, 2^19585056558 is an apocalyptic number.

19585056558 is an abundant number, since it is smaller than the sum of its proper divisors (21402522834).

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

19585056558 is a wasteful number, since it uses less digits than its factorization.

19585056558 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1442520.

The product of its (nonzero) digits is 10800000, while the sum is 57.

The spelling of 19585056558 in words is "nineteen billion, five hundred eighty-five million, fifty-six thousand, five hundred fifty-eight".