20317361 has 2 divisors, whose sum is σ = 20317362. Its totient is φ = 20317360.

The previous prime is 20317357. The next prime is 20317373. The reversal of 20317361 is 16371302.

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., 17272336 + 3045025 = 4156^2 + 1745^2 .

It is a cyclic number.

It is not a de Polignac number, because 20317361 - 2² = 20317357 is a prime.

It is not a weakly prime, because it can be changed into another prime (20317351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10158680 + 10158681.

It is an arithmetic number, because the mean of its divisors is an integer number (10158681).

Almost surely, 2^20317361 is an apocalyptic number.

It is an amenable number.

20317361 is a deficient number, since it is larger than the sum of its proper divisors (1).

20317361 is an equidigital number, since it uses as much as digits as its factorization.

20317361 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 756, while the sum is 23.

The square root of 20317361 is about 4507.4783416008. The cubic root of 20317361 is about 272.8699842018.

Adding to 20317361 its reverse (16371302), we get a palindrome (36688663).

The spelling of 20317361 in words is "twenty million, three hundred seventeen thousand, three hundred sixty-one".