20045133 has 12 divisors (see below), whose sum is σ = 30478240. Its totient is φ = 12659976.

The previous prime is 20045131. The next prime is 20045161. The reversal of 20045133 is 33154002.

It is not a de Polignac number, because 20045133 - 2¹ = 20045131 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20045131) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 58441 + ... + 58782.

Almost surely, 2^20045133 is an apocalyptic number.

It is an amenable number.

20045133 is a deficient number, since it is larger than the sum of its proper divisors (10433107).

20045133 is a wasteful number, since it uses less digits than its factorization.

20045133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117248 (or 117245 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 18.

The square root of 20045133 is about 4477.1791342317. The cubic root of 20045133 is about 271.6457912790.

Adding to 20045133 its reverse (33154002), we get a palindrome (53199135).

The spelling of 20045133 in words is "twenty million, forty-five thousand, one hundred thirty-three".