19889714950 has 36 divisors (see below), whose sum is σ = 43034853852. Its totient is φ = 6819330000.

The previous prime is 19889714891. The next prime is 19889714951. The reversal of 19889714950 is 5941798891.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19889714951) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 4056676 + ... + 4061575.

It is an arithmetic number, because the mean of its divisors is an integer number (1195412607).

Almost surely, 2^19889714950 is an apocalyptic number.

19889714950 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19889714950 is an abundant number, since it is smaller than the sum of its proper divisors (23145138902).

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

19889714950 is a wasteful number, since it uses less digits than its factorization.

19889714950 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8118277 (or 8118265 counting only the distinct ones).

The product of its (nonzero) digits is 6531840, while the sum is 61.

The spelling of 19889714950 in words is "nineteen billion, eight hundred eighty-nine million, seven hundred fourteen thousand, nine hundred fifty".