19853989494 has 16 divisors (see below), whose sum is σ = 40988881920. Its totient is φ = 6404512680.

The previous prime is 19853989481. The next prime is 19853989501. The reversal of 19853989494 is 49498935891.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53370754 + ... + 53371125.

It is an arithmetic number, because the mean of its divisors is an integer number (2561805120).

Almost surely, 2^19853989494 is an apocalyptic number.

19853989494 is an abundant number, since it is smaller than the sum of its proper divisors (21134892426).

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

19853989494 is a wasteful number, since it uses less digits than its factorization.

19853989494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106741915.

The product of its digits is 100776960, while the sum is 69.

The spelling of 19853989494 in words is "nineteen billion, eight hundred fifty-three million, nine hundred eighty-nine thousand, four hundred ninety-four".