19384546664 has 64 divisors (see below), whose sum is σ = 42752655360. Its totient is φ = 8068294080.

The previous prime is 19384546651. The next prime is 19384546697. The reversal of 19384546664 is 46664548391.

It is a Harshad number since it is a multiple of its sum of digits (56).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 230009 + ... + 302775.

It is an arithmetic number, because the mean of its divisors is an integer number (668010240).

Almost surely, 2^19384546664 is an apocalyptic number.

19384546664 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 19384546664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21376327680).

19384546664 is an abundant number, since it is smaller than the sum of its proper divisors (23368108696).

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

19384546664 is a wasteful number, since it uses less digits than its factorization.

19384546664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72918 (or 72914 counting only the distinct ones).

The product of its digits is 14929920, while the sum is 56.

The spelling of 19384546664 in words is "nineteen billion, three hundred eighty-four million, five hundred forty-six thousand, six hundred sixty-four".