20823168 has 64 divisors (see below), whose sum is σ = 55789920. Its totient is φ = 6881280.

The previous prime is 20823167. The next prime is 20823169. The reversal of 20823168 is 86132802.

It is an interprime number because it is at equal distance from previous prime (20823167) and next prime (20823169).

It is a tau number, because it is divible by the number of its divisors (64).

It is not an unprimeable number, because it can be changed into a prime (20823167) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 80896 + ... + 81152.

Almost surely, 2^20823168 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 20823168, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27894960).

20823168 is an abundant number, since it is smaller than the sum of its proper divisors (34966752).

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

20823168 is a wasteful number, since it uses less digits than its factorization.

20823168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 485 (or 473 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 30.

The square root of 20823168 is about 4563.2409535329. The cubic root of 20823168 is about 275.1158432054.

The spelling of 20823168 in words is "twenty million, eight hundred twenty-three thousand, one hundred sixty-eight".