19803205076 has 6 divisors (see below), whose sum is σ = 34655608890. Its totient is φ = 9901602536.

The previous prime is 19803205073. The next prime is 19803205099. The reversal of 19803205076 is 67050230891.

It can be written as a sum of positive squares in only one way, i.e., 15556076176 + 4247128900 = 124724^2 + 65170^2 .

It is a super-2 number, since 2×19803205076² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19803205073) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2475400631 + ... + 2475400638.

It is an arithmetic number, because the mean of its divisors is an integer number (5775934815).

Almost surely, 2^19803205076 is an apocalyptic number.

It is an amenable number.

19803205076 is a deficient number, since it is larger than the sum of its proper divisors (14852403814).

19803205076 is a wasteful number, since it uses less digits than its factorization.

19803205076 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4950801273 (or 4950801271 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 41.

The spelling of 19803205076 in words is "nineteen billion, eight hundred three million, two hundred five thousand, seventy-six".