20412744502556 has 96 divisors (see below), whose sum is σ = 41935536276480. Its totient is φ = 8514583773696.

The previous prime is 20412744502547. The next prime is 20412744502567. The reversal of 20412744502556 is 65520544721402.

It is a self number, because there is not a number n which added to its sum of digits gives 20412744502556.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 41619305 + ... + 42106911.

It is an arithmetic number, because the mean of its divisors is an integer number (436828502880).

Almost surely, 2^{20412744502556} is an apocalyptic number.

It is an amenable number.

20412744502556 is an abundant number, since it is smaller than the sum of its proper divisors (21522791773924).

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

20412744502556 is a wasteful number, since it uses less digits than its factorization.

20412744502556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 487971 (or 487969 counting only the distinct ones).

The product of its (nonzero) digits is 2688000, while the sum is 47.

The spelling of 20412744502556 in words is "twenty trillion, four hundred twelve billion, seven hundred forty-four million, five hundred two thousand, five hundred fifty-six".