20220284 has 12 divisors (see below), whose sum is σ = 40440624. Its totient is φ = 8665824.

The previous prime is 20220283. The next prime is 20220307. The reversal of 20220284 is 48202202.

20220284 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20220283) 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, 361049 + ... + 361104.

It is an arithmetic number, because the mean of its divisors is an integer number (3370052).

Almost surely, 2^20220284 is an apocalyptic number.

It is an amenable number.

20220284 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

20220284 is a wasteful number, since it uses less digits than its factorization.

20220284 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 722164 (or 722162 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 20.

The square root of 20220284 is about 4496.6970100286. The cubic root of 20220284 is about 272.4346963566.

Adding to 20220284 its reverse (48202202), we get a palindrome (68422486).

The spelling of 20220284 in words is "twenty million, two hundred twenty thousand, two hundred eighty-four".