20875500 has 72 divisors (see below), whose sum is σ = 65869440. Its totient is φ = 5565600.

The previous prime is 20875483. The next prime is 20875523. The reversal of 20875500 is 557802.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2181 + ... + 6819.

Almost surely, 2^20875500 is an apocalyptic number.

20875500 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 20875500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32934720).

20875500 is an abundant number, since it is smaller than the sum of its proper divisors (44993940).

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

20875500 is a wasteful number, since it uses less digits than its factorization.

20875500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4664 (or 4649 counting only the distinct ones).

The product of its (nonzero) digits is 2800, while the sum is 27.

The square root of 20875500 is about 4568.9714378621. The cubic root of 20875500 is about 275.3461206565.

The spelling of 20875500 in words is "twenty million, eight hundred seventy-five thousand, five hundred".