20461297 has 2 divisors, whose sum is σ = 20461298. Its totient is φ = 20461296.

The previous prime is 20461279. The next prime is 20461307. The reversal of 20461297 is 79216402.

Together with previous prime (20461279) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10751841 + 9709456 = 3279^2 + 3116^2 .

It is a cyclic number.

It is not a de Polignac number, because 20461297 - 2¹¹ = 20459249 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20467297) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10230648 + 10230649.

It is an arithmetic number, because the mean of its divisors is an integer number (10230649).

Almost surely, 2^20461297 is an apocalyptic number.

It is an amenable number.

20461297 is a deficient number, since it is larger than the sum of its proper divisors (1).

20461297 is an equidigital number, since it uses as much as digits as its factorization.

20461297 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 20461297 is about 4523.4165185178. The cubic root of 20461297 is about 273.5128404770.

Adding to 20461297 its reverse (79216402), we get a palindrome (99677699).

The spelling of 20461297 in words is "twenty million, four hundred sixty-one thousand, two hundred ninety-seven".