20132145 has 40 divisors (see below), whose sum is σ = 39378240. Its totient is φ = 9758880.

The previous prime is 20132129. The next prime is 20132149. The reversal of 20132145 is 54123102.

It is not a de Polignac number, because 20132145 - 2⁴ = 20132129 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20132149) by changing a digit.

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 39 ways as a sum of consecutive naturals, for example, 2196 + ... + 6714.

It is an arithmetic number, because the mean of its divisors is an integer number (984456).

Almost surely, 2^20132145 is an apocalyptic number.

It is an amenable number.

20132145 is a deficient number, since it is larger than the sum of its proper divisors (19246095).

20132145 is a wasteful number, since it uses less digits than its factorization.

20132145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4547 (or 4538 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 20132145 is about 4486.8858911276. The cubic root of 20132145 is about 272.0382776652.

Adding to 20132145 its reverse (54123102), we get a palindrome (74255247).

The spelling of 20132145 in words is "twenty million, one hundred thirty-two thousand, one hundred forty-five".