20132545 has 4 divisors (see below), whose sum is σ = 24159060. Its totient is φ = 16106032.

The previous prime is 20132513. The next prime is 20132569. The reversal of 20132545 is 54523102.

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 8620096 + 11512449 = 2936^2 + 3393^2 .

It is a cyclic number.

It is not a de Polignac number, because 20132545 - 2⁵ = 20132513 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2013250 + ... + 2013259.

It is an arithmetic number, because the mean of its divisors is an integer number (6039765).

Almost surely, 2^20132545 is an apocalyptic number.

It is an amenable number.

20132545 is a deficient number, since it is larger than the sum of its proper divisors (4026515).

20132545 is an equidigital number, since it uses as much as digits as its factorization.

20132545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4026514.

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 20132545 is about 4486.9304652513. The cubic root of 20132545 is about 272.0400793377.

Adding to 20132545 its reverse (54523102), we get a palindrome (74655647).

The spelling of 20132545 in words is "twenty million, one hundred thirty-two thousand, five hundred forty-five".