20442244019 has 4 divisors (see below), whose sum is σ = 20442692544. Its totient is φ = 20441795496.

The previous prime is 20442243971. The next prime is 20442244027. The reversal of 20442244019 is 91044224402.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 91044224402 = 2 ⋅45522112201.

It is a cyclic number.

It is not a de Polignac number, because 20442244019 - 2⁸ = 20442243763 is a prime.

It is a super-2 number, since 2×20442244019² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20442244519) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 147032 + ... + 250005.

It is an arithmetic number, because the mean of its divisors is an integer number (5110673136).

Almost surely, 2^20442244019 is an apocalyptic number.

20442244019 is a deficient number, since it is larger than the sum of its proper divisors (448525).

20442244019 is an equidigital number, since it uses as much as digits as its factorization.

20442244019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 448524.

The product of its (nonzero) digits is 18432, while the sum is 32.

The spelling of 20442244019 in words is "twenty billion, four hundred forty-two million, two hundred forty-four thousand, nineteen".