20110313309 has 2 divisors, whose sum is σ = 20110313310. Its totient is φ = 20110313308.

The previous prime is 20110313261. The next prime is 20110313323. The reversal of 20110313309 is 90331301102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20098732900 + 11580409 = 141770^2 + 3403^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20110313309 is a prime.

It is a super-2 number, since 2×20110313309² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20110313339) 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, 10055156654 + 10055156655.

It is an arithmetic number, because the mean of its divisors is an integer number (10055156655).

Almost surely, 2^20110313309 is an apocalyptic number.

It is an amenable number.

20110313309 is a deficient number, since it is larger than the sum of its proper divisors (1).

20110313309 is an equidigital number, since it uses as much as digits as its factorization.

20110313309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 486, while the sum is 23.

It can be divided in two parts, 201103 and 13309, that added together give a palindrome (214412).

The spelling of 20110313309 in words is "twenty billion, one hundred ten million, three hundred thirteen thousand, three hundred nine".