20529828 has 72 divisors (see below), whose sum is σ = 58541280. Its totient is φ = 6217200.

The previous prime is 20529799. The next prime is 20529851. The reversal of 20529828 is 82892502.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 20529792 and 20529801.

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, 12283 + ... + 13853.

Almost surely, 2^20529828 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 20529828, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29270640).

20529828 is an abundant number, since it is smaller than the sum of its proper divisors (38011452).

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

20529828 is a wasteful number, since it uses less digits than its factorization.

20529828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1606 (or 1587 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The square root of 20529828 is about 4530.9853233044. The cubic root of 20529828 is about 273.8178589514.

The spelling of 20529828 in words is "twenty million, five hundred twenty-nine thousand, eight hundred twenty-eight".