19839820020 has 24 divisors (see below), whose sum is σ = 55551496224. Its totient is φ = 5290618656.

The previous prime is 19839820003. The next prime is 19839820043. The reversal of 19839820020 is 2002893891.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 165331774 + ... + 165331893.

It is an arithmetic number, because the mean of its divisors is an integer number (2314645676).

Almost surely, 2^19839820020 is an apocalyptic number.

19839820020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19839820020 is an abundant number, since it is smaller than the sum of its proper divisors (35711676204).

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

19839820020 is a wasteful number, since it uses less digits than its factorization.

19839820020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 330663679 (or 330663677 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 42.

The spelling of 19839820020 in words is "nineteen billion, eight hundred thirty-nine million, eight hundred twenty thousand, twenty".