19644044104 has 16 divisors (see below), whose sum is σ = 37058551920. Its totient is φ = 9761763600.

The previous prime is 19644044047. The next prime is 19644044111. The reversal of 19644044104 is 40144044691.

It is a super-3 number, since 3×19644044104³ (a number of 32 digits) contains 333 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7530922 + ... + 7533529.

It is an arithmetic number, because the mean of its divisors is an integer number (2316159495).

Almost surely, 2^19644044104 is an apocalyptic number.

It is an amenable number.

19644044104 is a deficient number, since it is larger than the sum of its proper divisors (17414507816).

19644044104 is a wasteful number, since it uses less digits than its factorization.

19644044104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15064620 (or 15064616 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 37.

Adding to 19644044104 its reverse (40144044691), we get a palindrome (59788088795).

The spelling of 19644044104 in words is "nineteen billion, six hundred forty-four million, forty-four thousand, one hundred four".