19840120850 has 48 divisors (see below), whose sum is σ = 42007757760. Its totient is φ = 6900907200.

The previous prime is 19840120849. The next prime is 19840120889. The reversal of 19840120850 is 5802104891.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 771545 + ... + 796844.

It is an arithmetic number, because the mean of its divisors is an integer number (875161620).

Almost surely, 2^19840120850 is an apocalyptic number.

19840120850 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19840120850 is an abundant number, since it is smaller than the sum of its proper divisors (22167636910).

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

19840120850 is a wasteful number, since it uses less digits than its factorization.

19840120850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1568435 (or 1568430 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 38.

The spelling of 19840120850 in words is "nineteen billion, eight hundred forty million, one hundred twenty thousand, eight hundred fifty".