20324413 has 2 divisors, whose sum is σ = 20324414. Its totient is φ = 20324412.

The previous prime is 20324399. The next prime is 20324453. The reversal of 20324413 is 31442302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18983449 + 1340964 = 4357^2 + 1158^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20324413 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20324453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10162206 + 10162207.

It is an arithmetic number, because the mean of its divisors is an integer number (10162207).

Almost surely, 2^20324413 is an apocalyptic number.

It is an amenable number.

20324413 is a deficient number, since it is larger than the sum of its proper divisors (1).

20324413 is an equidigital number, since it uses as much as digits as its factorization.

20324413 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 20324413 is about 4508.2605292951. The cubic root of 20324413 is about 272.9015509087.

Adding to 20324413 its reverse (31442302), we get a palindrome (51766715).

The spelling of 20324413 in words is "twenty million, three hundred twenty-four thousand, four hundred thirteen".