20404400240444 has 12 divisors (see below), whose sum is σ = 38953855004568. Its totient is φ = 9274727382000.

The previous prime is 20404400240437. The next prime is 20404400240467. The reversal of 20404400240444 is 44404200440402.

It is a super-4 number, since 4×20404400240444⁴ (a number of 54 digits) contains 4444 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20404400240444.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 231868184507 + ... + 231868184594.

It is an arithmetic number, because the mean of its divisors is an integer number (3246154583714).

Almost surely, 2^{20404400240444} is an apocalyptic number.

It is an amenable number.

20404400240444 is a deficient number, since it is larger than the sum of its proper divisors (18549454764124).

20404400240444 is a wasteful number, since it uses less digits than its factorization.

20404400240444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 463736369116 (or 463736369114 counting only the distinct ones).

The product of its (nonzero) digits is 65536, while the sum is 32.

Adding to 20404400240444 its reverse (44404200440402), we get a palindrome (64808600680846).

The spelling of 20404400240444 in words is "twenty trillion, four hundred four billion, four hundred million, two hundred forty thousand, four hundred forty-four".