20244442004021 has 8 divisors (see below), whose sum is σ = 20365164268344. Its totient is φ = 20123762296000.

The previous prime is 20244442004011. The next prime is 20244442004041. The reversal of 20244442004021 is 12040024444202.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 18158583941521 + 2085858062500 = 4261289^2 + 1444250^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20244442004021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20244442004011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9684566 + ... + 11587911.

It is an arithmetic number, because the mean of its divisors is an integer number (2545645533543).

Almost surely, 2^{20244442004021} is an apocalyptic number.

It is an amenable number.

20244442004021 is a deficient number, since it is larger than the sum of its proper divisors (120722264323).

20244442004021 is a wasteful number, since it uses less digits than its factorization.

20244442004021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21278151.

The product of its (nonzero) digits is 16384, while the sum is 29.

Adding to 20244442004021 its reverse (12040024444202), we get a palindrome (32284466448223).

The spelling of 20244442004021 in words is "twenty trillion, two hundred forty-four billion, four hundred forty-two million, four thousand, twenty-one".