20975200 has 72 divisors (see below), whose sum is σ = 51840432. Its totient is φ = 8286720.

The previous prime is 20975191. The next prime is 20975203. The reversal of 20975200 is 257902.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20975203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 125517 + ... + 125683.

It is an arithmetic number, because the mean of its divisors is an integer number (720006).

Almost surely, 2^20975200 is an apocalyptic number.

20975200 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 20975200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25920216).

20975200 is an abundant number, since it is smaller than the sum of its proper divisors (30865232).

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

20975200 is a wasteful number, since it uses less digits than its factorization.

20975200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 344 (or 331 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 25.

The square root of 20975200 is about 4579.8689937595. The cubic root of 20975200 is about 275.7837695883.

The spelling of 20975200 in words is "twenty million, nine hundred seventy-five thousand, two hundred".