20355103263013 has 2 divisors, whose sum is σ = 20355103263014. Its totient is φ = 20355103263012.

The previous prime is 20355103262987. The next prime is 20355103263091. The reversal of 20355103263013 is 31036230155302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12466880537409 + 7888222725604 = 3530847^2 + 2808598^2 .

It is a cyclic number.

It is not a de Polignac number, because 20355103263013 - 2²⁵ = 20355069708581 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20355103263013.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20355113263013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10177551631506 + 10177551631507.

It is an arithmetic number, because the mean of its divisors is an integer number (10177551631507).

Almost surely, 2^{20355103263013} is an apocalyptic number.

It is an amenable number.

20355103263013 is a deficient number, since it is larger than the sum of its proper divisors (1).

20355103263013 is an equidigital number, since it uses as much as digits as its factorization.

20355103263013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48600, while the sum is 34.

The spelling of 20355103263013 in words is "twenty trillion, three hundred fifty-five billion, one hundred three million, two hundred sixty-three thousand, thirteen".