20313473 has 2 divisors, whose sum is σ = 20313474. Its totient is φ = 20313472.

The previous prime is 20313467. The next prime is 20313493. The reversal of 20313473 is 37431302.

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., 13490929 + 6822544 = 3673^2 + 2612^2 .

It is a cyclic number.

It is not a de Polignac number, because 20313473 - 2¹⁸ = 20051329 is a prime.

It is not a weakly prime, because it can be changed into another prime (20313493) 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, 10156736 + 10156737.

It is an arithmetic number, because the mean of its divisors is an integer number (10156737).

Almost surely, 2^20313473 is an apocalyptic number.

It is an amenable number.

20313473 is a deficient number, since it is larger than the sum of its proper divisors (1).

20313473 is an equidigital number, since it uses as much as digits as its factorization.

20313473 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1512, while the sum is 23.

The square root of 20313473 is about 4507.0470376955. The cubic root of 20313473 is about 272.8525773122.

Adding to 20313473 its reverse (37431302), we get a palindrome (57744775).

The spelling of 20313473 in words is "twenty million, three hundred thirteen thousand, four hundred seventy-three".