16821886164 has 24 divisors (see below), whose sum is σ = 40311908448. Its totient is φ = 5455746720.

The previous prime is 16821886163. The next prime is 16821886183. The reversal of 16821886164 is 46168812861.

It is a super-2 number, since 2×16821886164² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16821886163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18943122 + ... + 18944009.

It is an arithmetic number, because the mean of its divisors is an integer number (1679662852).

Almost surely, 2^16821886164 is an apocalyptic number.

It is an amenable number.

16821886164 is an abundant number, since it is smaller than the sum of its proper divisors (23490022284).

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

16821886164 is a wasteful number, since it uses less digits than its factorization.

16821886164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37887175 (or 37887173 counting only the distinct ones).

The product of its digits is 884736, while the sum is 51.

The spelling of 16821886164 in words is "sixteen billion, eight hundred twenty-one million, eight hundred eighty-six thousand, one hundred sixty-four".