20317936061 has 2 divisors, whose sum is σ = 20317936062. Its totient is φ = 20317936060.

The previous prime is 20317936049. The next prime is 20317936081. The reversal of 20317936061 is 16063971302.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15120391225 + 5197544836 = 122965^2 + 72094^2 .

It is a cyclic number.

It is not a de Polignac number, because 20317936061 - 2⁶ = 20317935997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20317936031) 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, 10158968030 + 10158968031.

It is an arithmetic number, because the mean of its divisors is an integer number (10158968031).

Almost surely, 2^20317936061 is an apocalyptic number.

It is an amenable number.

20317936061 is a deficient number, since it is larger than the sum of its proper divisors (1).

20317936061 is an equidigital number, since it uses as much as digits as its factorization.

20317936061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40824, while the sum is 38.

The spelling of 20317936061 in words is "twenty billion, three hundred seventeen million, nine hundred thirty-six thousand, sixty-one".