20135075757473 has 2 divisors, whose sum is σ = 20135075757474. Its totient is φ = 20135075757472.

The previous prime is 20135075757383. The next prime is 20135075757481. The reversal of 20135075757473 is 37475757053102.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12974490448144 + 7160585309329 = 3602012^2 + 2675927^2 .

It is a cyclic number.

It is not a de Polignac number, because 20135075757473 - 2⁸ = 20135075757217 is a prime.

It is not a weakly prime, because it can be changed into another prime (20135075754473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10067537878736 + 10067537878737.

It is an arithmetic number, because the mean of its divisors is an integer number (10067537878737).

Almost surely, 2^{20135075757473} is an apocalyptic number.

It is an amenable number.

20135075757473 is a deficient number, since it is larger than the sum of its proper divisors (1).

20135075757473 is an equidigital number, since it uses as much as digits as its factorization.

20135075757473 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21609000, while the sum is 56.

The spelling of 20135075757473 in words is "twenty trillion, one hundred thirty-five billion, seventy-five million, seven hundred fifty-seven thousand, four hundred seventy-three".