19820006802 has 54 divisors (see below), whose sum is σ = 44629062933. Its totient is φ = 6601293288.

The previous prime is 19820006797. The next prime is 19820006827. The reversal of 19820006802 is 20860002891.

It can be written as a sum of positive squares in 2 ways, for example, as 12153078081 + 7666928721 = 110241^2 + 87561^2 .

It is a tau number, because it is divible by the number of its divisors (54).

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=99549.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 16126324 + ... + 16127552.

Almost surely, 2^19820006802 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19820006802

19820006802 is an abundant number, since it is smaller than the sum of its proper divisors (24809056131).

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

19820006802 is an frugal number, since it uses more digits than its factorization.

19820006802 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2484 (or 1234 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The spelling of 19820006802 in words is "nineteen billion, eight hundred twenty million, six thousand, eight hundred two".