16822181889 has 12 divisors (see below), whose sum is σ = 24305638500. Its totient is φ = 11211588864.

The previous prime is 16822181863. The next prime is 16822181891. The reversal of 16822181889 is 98818122861.

It can be written as a sum of positive squares in 2 ways, for example, as 1157156289 + 15665025600 = 34017^2 + 125160^2 .

It is not a de Polignac number, because 16822181889 - 2²⁰ = 16821133313 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16822181809) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 233064 + ... + 296585.

It is an arithmetic number, because the mean of its divisors is an integer number (2025469875).

Almost surely, 2^16822181889 is an apocalyptic number.

It is an amenable number.

16822181889 is a deficient number, since it is larger than the sum of its proper divisors (7483456611).

16822181889 is a wasteful number, since it uses less digits than its factorization.

16822181889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 533184 (or 533181 counting only the distinct ones).

The product of its digits is 884736, while the sum is 54.

The spelling of 16822181889 in words is "sixteen billion, eight hundred twenty-two million, one hundred eighty-one thousand, eight hundred eighty-nine".