20315473 has 2 divisors, whose sum is σ = 20315474. Its totient is φ = 20315472.

The previous prime is 20315467. The next prime is 20315489. The reversal of 20315473 is 37451302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17032129 + 3283344 = 4127^2 + 1812^2 .

It is a cyclic number.

It is not a de Polignac number, because 20315473 - 2⁵ = 20315441 is a prime.

It is not a weakly prime, because it can be changed into another prime (20315413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10157736 + 10157737.

It is an arithmetic number, because the mean of its divisors is an integer number (10157737).

Almost surely, 2^20315473 is an apocalyptic number.

It is an amenable number.

20315473 is a deficient number, since it is larger than the sum of its proper divisors (1).

20315473 is an equidigital number, since it uses as much as digits as its factorization.

20315473 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2520, while the sum is 25.

The square root of 20315473 is about 4507.2689069990. The cubic root of 20315473 is about 272.8615317509.

Adding to 20315473 its reverse (37451302), we get a palindrome (57766775).

The spelling of 20315473 in words is "twenty million, three hundred fifteen thousand, four hundred seventy-three".