20875120 has 40 divisors (see below), whose sum is σ = 55469664. Its totient is φ = 7156992.

The previous prime is 20875111. The next prime is 20875139. The reversal of 20875120 is 2157802.

It is a tau number, because it is divible by the number of its divisors (40).

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 7 ways as a sum of consecutive naturals, for example, 18079 + ... + 19198.

Almost surely, 2^20875120 is an apocalyptic number.

20875120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20875120 is an abundant number, since it is smaller than the sum of its proper divisors (34594544).

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

20875120 is a wasteful number, since it uses less digits than its factorization.

20875120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37297 (or 37291 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 25.

The square root of 20875120 is about 4568.9298528211. The cubic root of 20875120 is about 275.3444499235.

The spelling of 20875120 in words is "twenty million, eight hundred seventy-five thousand, one hundred twenty".