20228504 has 32 divisors (see below), whose sum is σ = 40856400. Its totient is φ = 9354240.

The previous prime is 20228501. The next prime is 20228561. The reversal of 20228504 is 40582202.

It is a self number, because there is not a number n which added to its sum of digits gives 20228504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20228501) 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, 6764 + ... + 9284.

Almost surely, 2^20228504 is an apocalyptic number.

It is an amenable number.

20228504 is an abundant number, since it is smaller than the sum of its proper divisors (20627896).

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

20228504 is a wasteful number, since it uses less digits than its factorization.

20228504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2603 (or 2599 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 23.

The square root of 20228504 is about 4497.6109213670. The cubic root of 20228504 is about 272.4716082980.

The spelling of 20228504 in words is "twenty million, two hundred twenty-eight thousand, five hundred four".