20487528 has 96 divisors (see below), whose sum is σ = 58556160. Its totient is φ = 6462720.

The previous prime is 20487527. The next prime is 20487563. The reversal of 20487528 is 82578402.

It is a happy number.

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 = 20487492 and 20487501.

It is not an unprimeable number, because it can be changed into a prime (20487527) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 149476 + ... + 149612.

It is an arithmetic number, because the mean of its divisors is an integer number (609960).

Almost surely, 2^20487528 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 20487528, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29278080).

20487528 is an abundant number, since it is smaller than the sum of its proper divisors (38068632).

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

20487528 is a wasteful number, since it uses less digits than its factorization.

20487528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247 (or 240 counting only the distinct ones).

The product of its (nonzero) digits is 35840, while the sum is 36.

The square root of 20487528 is about 4526.3150575275. The cubic root of 20487528 is about 273.6296700152.

The spelling of 20487528 in words is "twenty million, four hundred eighty-seven thousand, five hundred twenty-eight".