20028222 has 20 divisors (see below), whose sum is σ = 44878416. Its totient is φ = 6676020.

The previous prime is 20028221. The next prime is 20028257. The reversal of 20028222 is 22282002.

It is a super-2 number, since 2×20028222² = 802259352962568, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 20028195 and 20028204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20028221) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 61654 + ... + 61977.

Almost surely, 2^20028222 is an apocalyptic number.

20028222 is an abundant number, since it is smaller than the sum of its proper divisors (24850194).

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

20028222 is a wasteful number, since it uses less digits than its factorization.

20028222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123645 (or 123636 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The square root of 20028222 is about 4475.2901581909. The cubic root of 20028222 is about 271.5693788081.

The spelling of 20028222 in words is "twenty million, twenty-eight thousand, two hundred twenty-two".