20622208 has 32 divisors (see below), whose sum is σ = 41664960. Its totient is φ = 10165248.

The previous prime is 20622197. The next prime is 20622229. The reversal of 20622208 is 80222602.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8241 + ... + 10447.

It is an arithmetic number, because the mean of its divisors is an integer number (1302030).

Almost surely, 2^20622208 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 20622208, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20832480).

20622208 is an abundant number, since it is smaller than the sum of its proper divisors (21042752).

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

20622208 is an equidigital number, since it uses as much as digits as its factorization.

20622208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2294 (or 2282 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 22.

The square root of 20622208 is about 4541.1681316595. The cubic root of 20622208 is about 274.2279524532.

The spelling of 20622208 in words is "twenty million, six hundred twenty-two thousand, two hundred eight".