20221448 has 32 divisors (see below), whose sum is σ = 41180160. Its totient is φ = 9253440.

The previous prime is 20221441. The next prime is 20221457. The reversal of 20221448 is 84412202.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (20221441) 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, 12443 + ... + 13973.

It is an arithmetic number, because the mean of its divisors is an integer number (1286880).

Almost surely, 2^20221448 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 20221448, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20590080).

20221448 is an abundant number, since it is smaller than the sum of its proper divisors (20958712).

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

20221448 is a wasteful number, since it uses less digits than its factorization.

20221448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1677 (or 1673 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 23.

The square root of 20221448 is about 4496.8264364994. The cubic root of 20221448 is about 272.4399239110.

The spelling of 20221448 in words is "twenty million, two hundred twenty-one thousand, four hundred forty-eight".