19671054844 has 96 divisors (see below), whose sum is σ = 43172236800. Its totient is φ = 7651687680.

The previous prime is 19671054833. The next prime is 19671054853. The reversal of 19671054844 is 44845017691.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2016202 + ... + 2025934.

It is an arithmetic number, because the mean of its divisors is an integer number (449710800).

Almost surely, 2^19671054844 is an apocalyptic number.

19671054844 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19671054844, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21586118400).

19671054844 is an abundant number, since it is smaller than the sum of its proper divisors (23501181956).

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

19671054844 is a wasteful number, since it uses less digits than its factorization.

19671054844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9923 (or 9921 counting only the distinct ones).

The product of its (nonzero) digits is 967680, while the sum is 49.

The spelling of 19671054844 in words is "nineteen billion, six hundred seventy-one million, fifty-four thousand, eight hundred forty-four".