20022442444421 has 4 divisors (see below), whose sum is σ = 20022571944000. Its totient is φ = 20022312944844.

The previous prime is 20022442444409. The next prime is 20022442444429. The reversal of 20022442444421 is 12444424422002.

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-20022442444421 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 (20022442444429) 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, 64517591 + ... + 64827188.

It is an arithmetic number, because the mean of its divisors is an integer number (5005642986000).

Almost surely, 2^{20022442444421} is an apocalyptic number.

It is an amenable number.

20022442444421 is a deficient number, since it is larger than the sum of its proper divisors (129499579).

20022442444421 is a wasteful number, since it uses less digits than its factorization.

20022442444421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129499578.

The product of its (nonzero) digits is 131072, while the sum is 35.

Adding to 20022442444421 its reverse (12444424422002), we get a palindrome (32466866866423).

The spelling of 20022442444421 in words is "twenty trillion, twenty-two billion, four hundred forty-two million, four hundred forty-four thousand, four hundred twenty-one".