20444204256 has 96 divisors (see below), whose sum is σ = 61356072960. Its totient is φ = 5838967296.

The previous prime is 20444204251. The next prime is 20444204293. The reversal of 20444204256 is 65240244402.

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-2 number, since 2×20444204256² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20444204251) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2661990 + ... + 2669658.

It is an arithmetic number, because the mean of its divisors is an integer number (639125760).

Almost surely, 2^20444204256 is an apocalyptic number.

It is an amenable number.

20444204256 is an abundant number, since it is smaller than the sum of its proper divisors (40911868704).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20444204256 is a wasteful number, since it uses less digits than its factorization.

20444204256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11656 (or 11648 counting only the distinct ones).

The product of its (nonzero) digits is 61440, while the sum is 33.

Adding to 20444204256 its reverse (65240244402), we get a palindrome (85684448658).

The spelling of 20444204256 in words is "twenty billion, four hundred forty-four million, two hundred four thousand, two hundred fifty-six".