20506213206744 has 32 divisors (see below), whose sum is σ = 51309995820720. Its totient is φ = 6829476028416.

The previous prime is 20506213206737. The next prime is 20506213206797. The reversal of 20506213206744 is 44760231260502.

It is a junction number, because it is equal to n+sod(n) for n = 20506213206696 and 20506213206705.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 370495117 + ... + 370550460.

Almost surely, 2^{20506213206744} is an apocalyptic number.

20506213206744 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20506213206744 is an abundant number, since it is smaller than the sum of its proper divisors (30803782613976).

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

20506213206744 is a wasteful number, since it uses less digits than its factorization.

20506213206744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 741046739 (or 741046735 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 42.

The spelling of 20506213206744 in words is "twenty trillion, five hundred six billion, two hundred thirteen million, two hundred six thousand, seven hundred forty-four".