20400244222056 has 64 divisors (see below), whose sum is σ = 51383142270720. Its totient is φ = 6749263672320.

The previous prime is 20400244222037. The next prime is 20400244222069. The reversal of 20400244222056 is 65022244200402.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4077360 + ... + 7577951.

It is an arithmetic number, because the mean of its divisors is an integer number (802861597980).

Almost surely, 2^{20400244222056} is an apocalyptic number.

It is an amenable number.

20400244222056 is an abundant number, since it is smaller than the sum of its proper divisors (30982898048664).

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

20400244222056 is a wasteful number, since it uses less digits than its factorization.

20400244222056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11655866 (or 11655862 counting only the distinct ones).

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

Adding to 20400244222056 its reverse (65022244200402), we get a palindrome (85422488422458).

The spelling of 20400244222056 in words is "twenty trillion, four hundred billion, two hundred forty-four million, two hundred twenty-two thousand, fifty-six".