20875130 has 16 divisors (see below), whose sum is σ = 37718784. Its totient is φ = 8318160.

The previous prime is 20875111. The next prime is 20875139. The reversal of 20875130 is 3157802.

It is a self number, because there is not a number n which added to its sum of digits gives 20875130.

It is not an unprimeable number, because it can be changed into a prime (20875139) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1142 + ... + 6561.

It is an arithmetic number, because the mean of its divisors is an integer number (2357424).

Almost surely, 2^20875130 is an apocalyptic number.

20875130 is a deficient number, since it is larger than the sum of its proper divisors (16843654).

20875130 is a wasteful number, since it uses less digits than its factorization.

20875130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7981.

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 20875130 is about 4568.9309471692. The cubic root of 20875130 is about 275.3444938904.

The spelling of 20875130 in words is "twenty million, eight hundred seventy-five thousand, one hundred thirty".