20135075757481 has 2 divisors, whose sum is σ = 20135075757482. Its totient is φ = 20135075757480.

The previous prime is 20135075757473. The next prime is 20135075757487. The reversal of 20135075757481 is 18475757053102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16212774727081 + 3922301030400 = 4026509^2 + 1980480^2 .

It is a cyclic number.

It is not a de Polignac number, because 20135075757481 - 2³ = 20135075757473 is a prime.

It is a super-3 number, since 3×20135075757481³ (a number of 41 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (20135075757487) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10067537878740 + 10067537878741.

It is an arithmetic number, because the mean of its divisors is an integer number (10067537878741).

Almost surely, 2^{20135075757481} is an apocalyptic number.

It is an amenable number.

20135075757481 is a deficient number, since it is larger than the sum of its proper divisors (1).

20135075757481 is an equidigital number, since it uses as much as digits as its factorization.

20135075757481 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8232000, while the sum is 55.

The spelling of 20135075757481 in words is "twenty trillion, one hundred thirty-five billion, seventy-five million, seven hundred fifty-seven thousand, four hundred eighty-one".