20822016 has 48 divisors (see below), whose sum is σ = 55528200. Its totient is φ = 6938624.

The previous prime is 20821981. The next prime is 20822017. The reversal of 20822016 is 61022802.

It is a tau number, because it is divible by the number of its divisors (48).

It is a junction number, because it is equal to n+sod(n) for n = 20821983 and 20822001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20822017) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4450 + ... + 7838.

Almost surely, 2^20822016 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 20822016, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27764100).

20822016 is an abundant number, since it is smaller than the sum of its proper divisors (34706184).

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

20822016 is an equidigital number, since it uses as much as digits as its factorization.

20822016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3414 (or 3394 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 20822016 is about 4563.1147257109. The cubic root of 20822016 is about 275.1107697012.

Adding to 20822016 its reverse (61022802), we get a palindrome (81844818).

The spelling of 20822016 in words is "twenty million, eight hundred twenty-two thousand, sixteen".