20875133 has 4 divisors (see below), whose sum is σ = 22103100. Its totient is φ = 19647168.

The previous prime is 20875111. The next prime is 20875139. The reversal of 20875133 is 33157802.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 19166884 + 1708249 = 4378^2 + 1307^2 .

It is a cyclic number.

It is not a de Polignac number, because 20875133 - 2⁶ = 20875069 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20875096 and 20875105.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 613958 + ... + 613991.

It is an arithmetic number, because the mean of its divisors is an integer number (5525775).

Almost surely, 2^20875133 is an apocalyptic number.

It is an amenable number.

20875133 is a deficient number, since it is larger than the sum of its proper divisors (1227967).

20875133 is a wasteful number, since it uses less digits than its factorization.

20875133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1227966.

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 20875133 is about 4568.9312754735. The cubic root of 20875133 is about 275.3445070805.

The spelling of 20875133 in words is "twenty million, eight hundred seventy-five thousand, one hundred thirty-three".