19685821914 has 48 divisors (see below), whose sum is σ = 46649921760. Its totient is φ = 5950042080.

The previous prime is 19685821913. The next prime is 19685821999. The reversal of 19685821914 is 41912858691.

It is not an unprimeable number, because it can be changed into a prime (19685821913) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 50772 + ... + 204815.

It is an arithmetic number, because the mean of its divisors is an integer number (971873370).

Almost surely, 2^19685821914 is an apocalyptic number.

19685821914 is an abundant number, since it is smaller than the sum of its proper divisors (26964099846).

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

19685821914 is a wasteful number, since it uses less digits than its factorization.

19685821914 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255995 (or 255992 counting only the distinct ones).

The product of its digits is 1244160, while the sum is 54.

The spelling of 19685821914 in words is "nineteen billion, six hundred eighty-five million, eight hundred twenty-one thousand, nine hundred fourteen".