20125133 has 6 divisors (see below), whose sum is σ = 23410926. Its totient is φ = 17250072.

The previous prime is 20125117. The next prime is 20125153. The reversal of 20125133 is 33152102.

It can be written as a sum of positive squares in only one way, i.e., 18774889 + 1350244 = 4333^2 + 1162^2 .

It is not a de Polignac number, because 20125133 - 2⁴ = 20125117 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20125103) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 205310 + ... + 205407.

It is an arithmetic number, because the mean of its divisors is an integer number (3901821).

Almost surely, 2^20125133 is an apocalyptic number.

It is an amenable number.

20125133 is a deficient number, since it is larger than the sum of its proper divisors (3285793).

20125133 is an equidigital number, since it uses as much as digits as its factorization.

20125133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 410731 (or 410724 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 17.

The square root of 20125133 is about 4486.1044348076. The cubic root of 20125133 is about 272.0066904712.

Adding to 20125133 its reverse (33152102), we get a palindrome (53277235).

The spelling of 20125133 in words is "twenty million, one hundred twenty-five thousand, one hundred thirty-three".