19820443477929 has 12 divisors (see below), whose sum is σ = 26586452723664. Its totient is φ = 13134505402984.

The previous prime is 19820443477897. The next prime is 19820443477993. The reversal of 19820443477929 is 92977434402891.

It is not a de Polignac number, because 19820443477929 - 2⁵ = 19820443477897 is a prime.

It is not an unprimeable number, because it can be changed into a prime (19820443479929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 118364727 + ... + 118532060.

It is an arithmetic number, because the mean of its divisors is an integer number (2215537726972).

Almost surely, 2^{19820443477929} is an apocalyptic number.

It is an amenable number.

19820443477929 is a deficient number, since it is larger than the sum of its proper divisors (6766009245735).

19820443477929 is an equidigital number, since it uses as much as digits as its factorization.

19820443477929 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 236897124 (or 236896957 counting only the distinct ones).

The product of its (nonzero) digits is 219469824, while the sum is 69.

The spelling of 19820443477929 in words is "nineteen trillion, eight hundred twenty billion, four hundred forty-three million, four hundred seventy-seven thousand, nine hundred twenty-nine".