20442242003 has 4 divisors (see below), whose sum is σ = 20701004640. Its totient is φ = 20183479368.

The previous prime is 20442241933. The next prime is 20442242047. The reversal of 20442242003 is 30024224402.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20442242003 - 2²⁶ = 20375133139 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20442242003.

It is not an unprimeable number, because it can be changed into a prime (20442241003) 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, 129381200 + ... + 129381357.

It is an arithmetic number, because the mean of its divisors is an integer number (5175251160).

Almost surely, 2^20442242003 is an apocalyptic number.

20442242003 is a deficient number, since it is larger than the sum of its proper divisors (258762637).

20442242003 is an equidigital number, since it uses as much as digits as its factorization.

20442242003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 258762636.

The product of its (nonzero) digits is 3072, while the sum is 23.

Adding to 20442242003 its reverse (30024224402), we get a palindrome (50466466405).

The spelling of 20442242003 in words is "twenty billion, four hundred forty-two million, two hundred forty-two thousand, three".