20228264 has 16 divisors (see below), whose sum is σ = 43346400. Its totient is φ = 8669232.

The previous prime is 20228239. The next prime is 20228267. The reversal of 20228264 is 46282202.

It is not an unprimeable number, because it can be changed into a prime (20228267) 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, 180554 + ... + 180665.

It is an arithmetic number, because the mean of its divisors is an integer number (2709150).

Almost surely, 2^20228264 is an apocalyptic number.

It is an amenable number.

20228264 is an abundant number, since it is smaller than the sum of its proper divisors (23118136).

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

20228264 is a wasteful number, since it uses less digits than its factorization.

20228264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 361232 (or 361228 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 26.

The square root of 20228264 is about 4497.5842404562. The cubic root of 20228264 is about 272.4705307189.

The spelling of 20228264 in words is "twenty million, two hundred twenty-eight thousand, two hundred sixty-four".