20461172353 has 2 divisors, whose sum is σ = 20461172354. Its totient is φ = 20461172352.

The previous prime is 20461172339. The next prime is 20461172359. The reversal of 20461172353 is 35327116402.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18294456049 + 2166716304 = 135257^2 + 46548^2 .

It is a cyclic number.

It is not a de Polignac number, because 20461172353 - 2²⁵ = 20427617921 is a prime.

It is not a weakly prime, because it can be changed into another prime (20461172359) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10230586176 + 10230586177.

It is an arithmetic number, because the mean of its divisors is an integer number (10230586177).

Almost surely, 2^20461172353 is an apocalyptic number.

It is an amenable number.

20461172353 is a deficient number, since it is larger than the sum of its proper divisors (1).

20461172353 is an equidigital number, since it uses as much as digits as its factorization.

20461172353 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30240, while the sum is 34.

Adding to 20461172353 its reverse (35327116402), we get a palindrome (55788288755).

The spelling of 20461172353 in words is "twenty billion, four hundred sixty-one million, one hundred seventy-two thousand, three hundred fifty-three".