16163971220 has 48 divisors (see below), whose sum is σ = 34167302400. Its totient is φ = 6423252480.

The previous prime is 16163971189. The next prime is 16163971247. The reversal of 16163971220 is 2217936161.

It is a super-2 number, since 2×16163971220² (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 15 ways as a sum of consecutive naturals, for example, 2112161 + ... + 2119799.

It is an arithmetic number, because the mean of its divisors is an integer number (711818800).

Almost surely, 2^16163971220 is an apocalyptic number.

16163971220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16163971220 is an abundant number, since it is smaller than the sum of its proper divisors (18003331180).

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

16163971220 is a wasteful number, since it uses less digits than its factorization.

16163971220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8328 (or 8326 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 38.

The spelling of 16163971220 in words is "sixteen billion, one hundred sixty-three million, nine hundred seventy-one thousand, two hundred twenty".