20228385528 has 128 divisors (see below), whose sum is σ = 61538400000. Its totient is φ = 6118574976.

The previous prime is 20228385523. The next prime is 20228385547. The reversal of 20228385528 is 82558382202.

20228385528 is a `hidden beast` number, since 20 + 2 + 28 + 3 + 85 + 528 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20228385523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 104623 + ... + 226721.

It is an arithmetic number, because the mean of its divisors is an integer number (480768750).

Almost surely, 2^20228385528 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20228385528, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30769200000).

20228385528 is an abundant number, since it is smaller than the sum of its proper divisors (41310014472).

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

20228385528 is a wasteful number, since it uses less digits than its factorization.

20228385528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122186 (or 122176 counting only the distinct ones).

The product of its (nonzero) digits is 614400, while the sum is 45.

The spelling of 20228385528 in words is "twenty billion, two hundred twenty-eight million, three hundred eighty-five thousand, five hundred twenty-eight".