20221282 has 16 divisors (see below), whose sum is σ = 32709600. Its totient is φ = 9344160.

The previous prime is 20221273. The next prime is 20221283. The reversal of 20221282 is 28212202.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is not an unprimeable number, because it can be changed into a prime (20221283) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 4932 + ... + 8047.

It is an arithmetic number, because the mean of its divisors is an integer number (2044350).

Almost surely, 2^20221282 is an apocalyptic number.

20221282 is a deficient number, since it is larger than the sum of its proper divisors (12488318).

20221282 is a wasteful number, since it uses less digits than its factorization.

20221282 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13041.

The product of its (nonzero) digits is 256, while the sum is 19.

The square root of 20221282 is about 4496.8079790002. The cubic root of 20221282 is about 272.4391784129.

Adding to 20221282 its reverse (28212202), we get a palindrome (48433484).

It can be divided in two parts, 20221 and 282, that added together give a triangular number (20503 = T₂₀₂).

The spelling of 20221282 in words is "twenty million, two hundred twenty-one thousand, two hundred eighty-two".