20228544 has 168 divisors, whose sum is σ = 68945760. Its totient is φ = 5548032.

The previous prime is 20228501. The next prime is 20228561. The reversal of 20228544 is 44582202.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (168).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 116842 + ... + 117014.

Almost surely, 2^20228544 is an apocalyptic number.

20228544 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20228544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34472880).

20228544 is an abundant number, since it is smaller than the sum of its proper divisors (48717216).

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

20228544 is a wasteful number, since it uses less digits than its factorization.

20228544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227 (or 214 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 27.

The square root of 20228544 is about 4497.6153681701. The cubic root of 20228544 is about 272.4717878937.

The spelling of 20228544 in words is "twenty million, two hundred twenty-eight thousand, five hundred forty-four".