20266228 has 12 divisors (see below), whose sum is σ = 35798112. Its totient is φ = 10038200.

The previous prime is 20266223. The next prime is 20266229. The reversal of 20266228 is 82266202.

It is a junction number, because it is equal to n+sod(n) for n = 20266196 and 20266205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20266223) 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, 23248 + ... + 24103.

It is an arithmetic number, because the mean of its divisors is an integer number (2983176).

Almost surely, 2^20266228 is an apocalyptic number.

It is an amenable number.

20266228 is a deficient number, since it is larger than the sum of its proper divisors (15531884).

20266228 is a wasteful number, since it uses less digits than its factorization.

20266228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47462 (or 47460 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 28.

The square root of 20266228 is about 4501.8027500103. The cubic root of 20266228 is about 272.6408799356.

It can be divided in two parts, 202 and 66228, that added together give a triangular number (66430 = T₃₆₄).

The spelling of 20266228 in words is "twenty million, two hundred sixty-six thousand, two hundred twenty-eight".