20823324216 has 64 divisors (see below), whose sum is σ = 53777433600. Its totient is φ = 6712224000.

The previous prime is 20823324199. The next prime is 20823324251. The reversal of 20823324216 is 61242332802.

It is a super-2 number, since 2×20823324216² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1069900 + ... + 1089188.

It is an arithmetic number, because the mean of its divisors is an integer number (840272400).

Almost surely, 2^20823324216 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20823324216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26888716800).

20823324216 is an abundant number, since it is smaller than the sum of its proper divisors (32954109384).

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

20823324216 is a wasteful number, since it uses less digits than its factorization.

20823324216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20780 (or 20776 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 33.

The spelling of 20823324216 in words is "twenty billion, eight hundred twenty-three million, three hundred twenty-four thousand, two hundred sixteen".