20364228 has 36 divisors (see below), whose sum is σ = 51864540. Its totient is φ = 6736896.

The previous prime is 20364221. The next prime is 20364247. The reversal of 20364228 is 82246302.

It can be written as a sum of positive squares in 2 ways, for example, as 11614464 + 8749764 = 3408^2 + 2958^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (20364221) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2868 + ... + 6996.

Almost surely, 2^20364228 is an apocalyptic number.

It is an amenable number.

20364228 is an abundant number, since it is smaller than the sum of its proper divisors (31500312).

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

20364228 is a wasteful number, since it uses less digits than its factorization.

20364228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4276 (or 4271 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

The square root of 20364228 is about 4512.6741517641. The cubic root of 20364228 is about 273.0796370332.

The spelling of 20364228 in words is "twenty million, three hundred sixty-four thousand, two hundred twenty-eight".