20134821313 has 2 divisors, whose sum is σ = 20134821314. Its totient is φ = 20134821312.

The previous prime is 20134821229. The next prime is 20134821319. The reversal of 20134821313 is 31312843102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20014326784 + 120494529 = 141472^2 + 10977^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20134821313 is a prime.

It is a super-2 number, since 2×20134821313² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20134821319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10067410656 + 10067410657.

It is an arithmetic number, because the mean of its divisors is an integer number (10067410657).

Almost surely, 2^20134821313 is an apocalyptic number.

It is an amenable number.

20134821313 is a deficient number, since it is larger than the sum of its proper divisors (1).

20134821313 is an equidigital number, since it uses as much as digits as its factorization.

20134821313 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 28.

The spelling of 20134821313 in words is "twenty billion, one hundred thirty-four million, eight hundred twenty-one thousand, three hundred thirteen".