20579361905213 has 4 divisors (see below), whose sum is σ = 20693060037468. Its totient is φ = 20465663772960.

The previous prime is 20579361905183. The next prime is 20579361905239. The reversal of 20579361905213 is 31250916397502.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 220333543609 + 20359028361604 = 469397^2 + 4512098^2 .

It is a cyclic number.

It is not a de Polignac number, because 20579361905213 - 2⁸ = 20579361904957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20579361905243) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 56849065856 + ... + 56849066217.

It is an arithmetic number, because the mean of its divisors is an integer number (5173265009367).

Almost surely, 2^{20579361905213} is an apocalyptic number.

It is an amenable number.

20579361905213 is a deficient number, since it is larger than the sum of its proper divisors (113698132255).

20579361905213 is a wasteful number, since it uses less digits than its factorization.

20579361905213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113698132254.

The product of its (nonzero) digits is 3061800, while the sum is 53.

The spelling of 20579361905213 in words is "twenty trillion, five hundred seventy-nine billion, three hundred sixty-one million, nine hundred five thousand, two hundred thirteen".