20442417 has 4 divisors (see below), whose sum is σ = 27256560. Its totient is φ = 13628276.

The previous prime is 20442413. The next prime is 20442427. The reversal of 20442417 is 71424402.

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 not a de Polignac number, because 20442417 - 2² = 20442413 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20442413) 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, 3407067 + ... + 3407072.

It is an arithmetic number, because the mean of its divisors is an integer number (6814140).

Almost surely, 2^20442417 is an apocalyptic number.

It is an amenable number.

20442417 is a deficient number, since it is larger than the sum of its proper divisors (6814143).

20442417 is an equidigital number, since it uses as much as digits as its factorization.

20442417 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6814142.

The product of its (nonzero) digits is 1792, while the sum is 24.

The square root of 20442417 is about 4521.3291187437. The cubic root of 20442417 is about 273.4286895469.

Adding to 20442417 its reverse (71424402), we get a palindrome (91866819).

The spelling of 20442417 in words is "twenty million, four hundred forty-two thousand, four hundred seventeen".