20042441 has 4 divisors (see below), whose sum is σ = 20118912. Its totient is φ = 19965972.

The previous prime is 20042417. The next prime is 20042443. The reversal of 20042441 is 14424002.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20042441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20042443) 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, 37841 + ... + 38366.

It is an arithmetic number, because the mean of its divisors is an integer number (5029728).

Almost surely, 2^20042441 is an apocalyptic number.

It is an amenable number.

20042441 is a deficient number, since it is larger than the sum of its proper divisors (76471).

20042441 is an equidigital number, since it uses as much as digits as its factorization.

20042441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76470.

The product of its (nonzero) digits is 256, while the sum is 17.

The square root of 20042441 is about 4476.8784884113. The cubic root of 20042441 is about 271.6336303352.

Adding to 20042441 its reverse (14424002), we get a palindrome (34466443).

The spelling of 20042441 in words is "twenty million, forty-two thousand, four hundred forty-one".