20822928 has 80 divisors (see below), whose sum is σ = 63626880. Its totient is φ = 5741568.

The previous prime is 20822887. The next prime is 20822933. The reversal of 20822928 is 82922802.

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, 8676 + ... + 10812.

It is an arithmetic number, because the mean of its divisors is an integer number (795336).

Almost surely, 2^20822928 is an apocalyptic number.

20822928 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20822928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31813440).

20822928 is an abundant number, since it is smaller than the sum of its proper divisors (42803952).

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

20822928 is a wasteful number, since it uses less digits than its factorization.

20822928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2184 (or 2178 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 33.

The square root of 20822928 is about 4563.2146563579. The cubic root of 20822928 is about 275.1147862408.

The spelling of 20822928 in words is "twenty million, eight hundred twenty-two thousand, nine hundred twenty-eight".