20404400222424 has 32 divisors (see below), whose sum is σ = 51015132745920. Its totient is φ = 6800915782176.

The previous prime is 20404400222407. The next prime is 20404400222443. The reversal of 20404400222424 is 42422200440402.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 20404400222391 and 20404400222400.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34132414 + ... + 34725069.

It is an arithmetic number, because the mean of its divisors is an integer number (1594222898310).

Almost surely, 2^{20404400222424} is an apocalyptic number.

20404400222424 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20404400222424 is an abundant number, since it is smaller than the sum of its proper divisors (30610732523496).

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

20404400222424 is a wasteful number, since it uses less digits than its factorization.

20404400222424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68869839 (or 68869835 counting only the distinct ones).

The product of its (nonzero) digits is 32768, while the sum is 30.

Adding to 20404400222424 its reverse (42422200440402), we get a palindrome (62826600662826).

The spelling of 20404400222424 in words is "twenty trillion, four hundred four billion, four hundred million, two hundred twenty-two thousand, four hundred twenty-four".