20117631226393 has 2 divisors, whose sum is σ = 20117631226394. Its totient is φ = 20117631226392.

The previous prime is 20117631226327. The next prime is 20117631226417. The reversal of 20117631226393 is 39362213671102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13274159530384 + 6843471696009 = 3643372^2 + 2616003^2 .

It is a cyclic number.

It is not a de Polignac number, because 20117631226393 - 2³⁷ = 19980192272921 is a prime.

It is a super-2 number, since 2×20117631226393² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20117631226993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10058815613196 + 10058815613197.

It is an arithmetic number, because the mean of its divisors is an integer number (10058815613197).

Almost surely, 2^{20117631226393} is an apocalyptic number.

It is an amenable number.

20117631226393 is a deficient number, since it is larger than the sum of its proper divisors (1).

20117631226393 is an equidigital number, since it uses as much as digits as its factorization.

20117631226393 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 489888, while the sum is 46.

Adding to 20117631226393 its reverse (39362213671102), we get a palindrome (59479844897495).

The spelling of 20117631226393 in words is "twenty trillion, one hundred seventeen billion, six hundred thirty-one million, two hundred twenty-six thousand, three hundred ninety-three".