20413504241161 has 2 divisors, whose sum is σ = 20413504241162. Its totient is φ = 20413504241160.

The previous prime is 20413504241147. The next prime is 20413504241269. The reversal of 20413504241161 is 16114240531402.

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., 20305883502025 + 107620739136 = 4506205^2 + 328056^2 .

It is a cyclic number.

It is not a de Polignac number, because 20413504241161 - 2⁷ = 20413504241033 is a prime.

It is a super-2 number, since 2×20413504241161² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20413504241861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10206752120580 + 10206752120581.

It is an arithmetic number, because the mean of its divisors is an integer number (10206752120581).

Almost surely, 2^{20413504241161} is an apocalyptic number.

It is an amenable number.

20413504241161 is a deficient number, since it is larger than the sum of its proper divisors (1).

20413504241161 is an equidigital number, since it uses as much as digits as its factorization.

20413504241161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23040, while the sum is 34.

Adding to 20413504241161 its reverse (16114240531402), we get a palindrome (36527744772563).

The spelling of 20413504241161 in words is "twenty trillion, four hundred thirteen billion, five hundred four million, two hundred forty-one thousand, one hundred sixty-one".