20442033 has 6 divisors (see below), whose sum is σ = 29527394. Its totient is φ = 13628016.

The previous prime is 20442011. The next prime is 20442053. The reversal of 20442033 is 33024402.

It can be written as a sum of positive squares in only one way, i.e., 20223009 + 219024 = 4497^2 + 468^2 .

It is not a de Polignac number, because 20442033 - 2¹⁶ = 20376497 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20441997 and 20442015.

It is not an unprimeable number, because it can be changed into a prime (20442053) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1135660 + ... + 1135677.

Almost surely, 2^20442033 is an apocalyptic number.

It is an amenable number.

20442033 is a deficient number, since it is larger than the sum of its proper divisors (9085361).

20442033 is a wasteful number, since it uses less digits than its factorization.

20442033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2271343 (or 2271340 counting only the distinct ones).

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

The square root of 20442033 is about 4521.2866531553. The cubic root of 20442033 is about 273.4269774650.

Adding to 20442033 its reverse (33024402), we get a palindrome (53466435).

The spelling of 20442033 in words is "twenty million, four hundred forty-two thousand, thirty-three".