19884464664 has 96 divisors (see below), whose sum is σ = 54511411200. Its totient is φ = 6036963840.

The previous prime is 19884464653. The next prime is 19884464723. The reversal of 19884464664 is 46646448891.

It is a Smith number, since the sum of its digits (60) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 19884464598 and 19884464607.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 168777 + ... + 261255.

It is an arithmetic number, because the mean of its divisors is an integer number (567827200).

Almost surely, 2^19884464664 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19884464664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27255705600).

19884464664 is an abundant number, since it is smaller than the sum of its proper divisors (34626946536).

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

19884464664 is a wasteful number, since it uses less digits than its factorization.

19884464664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92553 (or 92532 counting only the distinct ones).

The product of its digits is 31850496, while the sum is 60.

The spelling of 19884464664 in words is "nineteen billion, eight hundred eighty-four million, four hundred sixty-four thousand, six hundred sixty-four".