20522238 has 32 divisors (see below), whose sum is σ = 45118080. Its totient is φ = 6171360.

The previous prime is 20522219. The next prime is 20522239. The reversal of 20522238 is 83222502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20522239) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8056 + ... + 10292.

It is an arithmetic number, because the mean of its divisors is an integer number (1409940).

Almost surely, 2^20522238 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20522238, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22559040).

20522238 is an abundant number, since it is smaller than the sum of its proper divisors (24595842).

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

20522238 is a wasteful number, since it uses less digits than its factorization.

20522238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2392.

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 20522238 is about 4530.1476797120. The cubic root of 20522238 is about 273.7841107595.

The spelling of 20522238 in words is "twenty million, five hundred twenty-two thousand, two hundred thirty-eight".