19998582028056 has 96 divisors (see below), whose sum is σ = 54253527728400. Its totient is φ = 6655037276160.

The previous prime is 19998582028027. The next prime is 19998582028081. The reversal of 19998582028056 is 65082028589991.

19998582028056 is a `hidden beast` number, since 19 + 9 + 9 + 8 + 582 + 0 + 28 + 0 + 5 + 6 = 666.

It is a super-2 number, since 2×19998582028056² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 151143880 + ... + 151276136.

Almost surely, 2^{19998582028056} is an apocalyptic number.

It is an amenable number.

19998582028056 is an abundant number, since it is smaller than the sum of its proper divisors (34254945700344).

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

19998582028056 is a wasteful number, since it uses less digits than its factorization.

19998582028056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135769 (or 135762 counting only the distinct ones).

The product of its (nonzero) digits is 223948800, while the sum is 72.

The spelling of 19998582028056 in words is "nineteen trillion, nine hundred ninety-eight billion, five hundred eighty-two million, twenty-eight thousand, fifty-six".