19864983164 has 24 divisors (see below), whose sum is σ = 37626002400. Its totient is φ = 9122376384.

The previous prime is 19864983139. The next prime is 19864983217. The reversal of 19864983164 is 46138946891.

It is a super-2 number, since 2×19864983164² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 949499 + ... + 970194.

It is an arithmetic number, because the mean of its divisors is an integer number (1567750100).

Almost surely, 2^19864983164 is an apocalyptic number.

It is an amenable number.

19864983164 is a deficient number, since it is larger than the sum of its proper divisors (17761019236).

19864983164 is a wasteful number, since it uses less digits than its factorization.

19864983164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1919909 (or 1919907 counting only the distinct ones).

The product of its digits is 8957952, while the sum is 59.

The spelling of 19864983164 in words is "nineteen billion, eight hundred sixty-four million, nine hundred eighty-three thousand, one hundred sixty-four".