19800537584 has 20 divisors (see below), whose sum is σ = 38528199216. Its totient is φ = 9857776512.

The previous prime is 19800537563. The next prime is 19800537599. The reversal of 19800537584 is 48573500891.

It is a super-2 number, since 2×19800537584² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2651924 + ... + 2659379.

Almost surely, 2^19800537584 is an apocalyptic number.

It is an amenable number.

19800537584 is a deficient number, since it is larger than the sum of its proper divisors (18727661632).

19800537584 is a wasteful number, since it uses less digits than its factorization.

19800537584 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5311544 (or 5311538 counting only the distinct ones).

The product of its (nonzero) digits is 1209600, while the sum is 50.

The spelling of 19800537584 in words is "nineteen billion, eight hundred million, five hundred thirty-seven thousand, five hundred eighty-four".