20435312262613 has 2 divisors, whose sum is σ = 20435312262614. Its totient is φ = 20435312262612.

The previous prime is 20435312262557. The next prime is 20435312262641. The reversal of 20435312262613 is 31626221353402.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11980749987684 + 8454562274929 = 3461322^2 + 2907673^2 .

It is a cyclic number.

It is not a de Polignac number, because 20435312262613 - 2²¹ = 20435310165461 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20435312262413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10217656131306 + 10217656131307.

It is an arithmetic number, because the mean of its divisors is an integer number (10217656131307).

Almost surely, 2^{20435312262613} is an apocalyptic number.

It is an amenable number.

20435312262613 is a deficient number, since it is larger than the sum of its proper divisors (1).

20435312262613 is an equidigital number, since it uses as much as digits as its factorization.

20435312262613 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 311040, while the sum is 40.

The spelling of 20435312262613 in words is "twenty trillion, four hundred thirty-five billion, three hundred twelve million, two hundred sixty-two thousand, six hundred thirteen".