19802022310728 has 192 divisors, whose sum is σ = 62335668096000. Its totient is φ = 5561394581376.

The previous prime is 19802022310699. The next prime is 19802022310783. The reversal of 19802022310728 is 82701322020891.

19802022310728 is a `hidden beast` number, since 198 + 0 + 202 + 231 + 0 + 7 + 28 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 706721503 + ... + 706749521.

It is an arithmetic number, because the mean of its divisors is an integer number (324664938000).

Almost surely, 2^{19802022310728} is an apocalyptic number.

19802022310728 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19802022310728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31167834048000).

19802022310728 is an abundant number, since it is smaller than the sum of its proper divisors (42533645785272).

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

19802022310728 is a wasteful number, since it uses less digits than its factorization.

19802022310728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51864 (or 51857 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 45.

The spelling of 19802022310728 in words is "nineteen trillion, eight hundred two billion, twenty-two million, three hundred ten thousand, seven hundred twenty-eight".