20004244703221 has 4 divisors (see below), whose sum is σ = 20004254359200. Its totient is φ = 20004235047244.

The previous prime is 20004244703159. The next prime is 20004244703231. The reversal of 20004244703221 is 12230744240002.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 20004244703221 - 2²¹ = 20004242606069 is a prime.

It is a super-2 number, since 2×20004244703221² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20004244703231) 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, 313051 + ... + 6332968.

It is an arithmetic number, because the mean of its divisors is an integer number (5001063589800).

Almost surely, 2^{20004244703221} is an apocalyptic number.

It is an amenable number.

20004244703221 is a deficient number, since it is larger than the sum of its proper divisors (9655979).

20004244703221 is an equidigital number, since it uses as much as digits as its factorization.

20004244703221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9655978.

The product of its (nonzero) digits is 21504, while the sum is 31.

Adding to 20004244703221 its reverse (12230744240002), we get a palindrome (32234988943223).

The spelling of 20004244703221 in words is "twenty trillion, four billion, two hundred forty-four million, seven hundred three thousand, two hundred twenty-one".