19802020181652 has 96 divisors (see below), whose sum is σ = 54044055542400. Its totient is φ = 6252869779200.

The previous prime is 19802020181641. The next prime is 19802020181653. The reversal of 19802020181652 is 25618102020891.

It is a junction number, because it is equal to n+sod(n) for n = 19802020181598 and 19802020181607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19802020181653) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 32656752 + ... + 33257592.

It is an arithmetic number, because the mean of its divisors is an integer number (562958911900).

Almost surely, 2^{19802020181652} is an apocalyptic number.

19802020181652 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

19802020181652 is an abundant number, since it is smaller than the sum of its proper divisors (34242035360748).

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

19802020181652 is a wasteful number, since it uses less digits than its factorization.

19802020181652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 616934 (or 616926 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 45.

The spelling of 19802020181652 in words is "nineteen trillion, eight hundred two billion, twenty million, one hundred eighty-one thousand, six hundred fifty-two".