20532500 has 60 divisors (see below), whose sum is σ = 46185216. Its totient is φ = 7980000.

The previous prime is 20532461. The next prime is 20532511. The reversal of 20532500 is 523502.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 107405 + ... + 107595.

Almost surely, 2^20532500 is an apocalyptic number.

20532500 is a gapful number since it is divisible by the number (20) 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 20532500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23092608).

20532500 is an abundant number, since it is smaller than the sum of its proper divisors (25652716).

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

20532500 is a wasteful number, since it uses less digits than its factorization.

20532500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 258 (or 241 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 17.

The square root of 20532500 is about 4531.2801723133. The cubic root of 20532500 is about 273.8297377581.

The spelling of 20532500 in words is "twenty million, five hundred thirty-two thousand, five hundred".