20734152613 has 2 divisors, whose sum is σ = 20734152614. Its totient is φ = 20734152612.

The previous prime is 20734152577. The next prime is 20734152617. The reversal of 20734152613 is 31625143702.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16466535684 + 4267616929 = 128322^2 + 65327^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20734152613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20734152617) by changing a digit.

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 as a sum of consecutive naturals, namely, 10367076306 + 10367076307.

It is an arithmetic number, because the mean of its divisors is an integer number (10367076307).

Almost surely, 2^20734152613 is an apocalyptic number.

It is an amenable number.

20734152613 is a deficient number, since it is larger than the sum of its proper divisors (1).

20734152613 is an equidigital number, since it uses as much as digits as its factorization.

20734152613 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30240, while the sum is 34.

The spelling of 20734152613 in words is "twenty billion, seven hundred thirty-four million, one hundred fifty-two thousand, six hundred thirteen".