20229528 has 128 divisors (see below), whose sum is σ = 60192000. Its totient is φ = 5598720.

The previous prime is 20229499. The next prime is 20229529. The reversal of 20229528 is 82592202.

It is a junction number, because it is equal to n+sod(n) for n = 20229495 and 20229504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20229529) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 185538 + ... + 185646.

It is an arithmetic number, because the mean of its divisors is an integer number (470250).

Almost surely, 2^20229528 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 20229528, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30096000).

20229528 is an abundant number, since it is smaller than the sum of its proper divisors (39962472).

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

20229528 is a wasteful number, since it uses less digits than its factorization.

20229528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185 (or 181 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 30.

The square root of 20229528 is about 4497.7247581416. The cubic root of 20229528 is about 272.4762058735.

The spelling of 20229528 in words is "twenty million, two hundred twenty-nine thousand, five hundred twenty-eight".