20026244222021 has 4 divisors (see below), whose sum is σ = 20170317921600. Its totient is φ = 19882170522444.

The previous prime is 20026244222009. The next prime is 20026244222053. The reversal of 20026244222021 is 12022244262002.

It is a happy number.

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-20026244222021 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20026244222321) 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, 72036849581 + ... + 72036849858.

It is an arithmetic number, because the mean of its divisors is an integer number (5042579480400).

Almost surely, 2^{20026244222021} is an apocalyptic number.

It is an amenable number.

20026244222021 is a deficient number, since it is larger than the sum of its proper divisors (144073699579).

20026244222021 is a wasteful number, since it uses less digits than its factorization.

20026244222021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144073699578.

The product of its (nonzero) digits is 12288, while the sum is 29.

Adding to 20026244222021 its reverse (12022244262002), we get a palindrome (32048488484023).

The spelling of 20026244222021 in words is "twenty trillion, twenty-six billion, two hundred forty-four million, two hundred twenty-two thousand, twenty-one".