20045033 has 4 divisors (see below), whose sum is σ = 20067540. Its totient is φ = 20022528.

The previous prime is 20045017. The next prime is 20045063. The reversal of 20045033 is 33054002.

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 7463824 + 12581209 = 2732^2 + 3547^2 .

It is a cyclic number.

It is not a de Polignac number, because 20045033 - 2⁴ = 20045017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20045063) 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, 9860 + ... + 11717.

It is an arithmetic number, because the mean of its divisors is an integer number (5016885).

Almost surely, 2^20045033 is an apocalyptic number.

It is an amenable number.

20045033 is a deficient number, since it is larger than the sum of its proper divisors (22507).

20045033 is an equidigital number, since it uses as much as digits as its factorization.

20045033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22506.

The product of its (nonzero) digits is 360, while the sum is 17.

The square root of 20045033 is about 4477.1679664717. The cubic root of 20045033 is about 271.6453395547.

Adding to 20045033 its reverse (33054002), we get a palindrome (53099035).

The spelling of 20045033 in words is "twenty million, forty-five thousand, thirty-three".