20042433 has 6 divisors (see below), whose sum is σ = 28950194. Its totient is φ = 13361616.

The previous prime is 20042417. The next prime is 20042443. The reversal of 20042433 is 33424002.

It can be written as a sum of positive squares in only one way, i.e., 19210689 + 831744 = 4383^2 + 912^2 .

It is not a de Polignac number, because 20042433 - 2⁴ = 20042417 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20042413) 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 5 ways as a sum of consecutive naturals, for example, 1113460 + ... + 1113477.

Almost surely, 2^20042433 is an apocalyptic number.

It is an amenable number.

20042433 is a deficient number, since it is larger than the sum of its proper divisors (8907761).

20042433 is a wasteful number, since it uses less digits than its factorization.

20042433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2226943 (or 2226940 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 18.

The square root of 20042433 is about 4476.8775949315. The cubic root of 20042433 is about 271.6335941941.

Adding to 20042433 its reverse (33424002), we get a palindrome (53466435).

The spelling of 20042433 in words is "twenty million, forty-two thousand, four hundred thirty-three".