20324789 has 2 divisors, whose sum is σ = 20324790. Its totient is φ = 20324788.

The previous prime is 20324771. The next prime is 20324819. The reversal of 20324789 is 98742302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11222500 + 9102289 = 3350^2 + 3017^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20324789 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20324089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10162394 + 10162395.

It is an arithmetic number, because the mean of its divisors is an integer number (10162395).

Almost surely, 2^20324789 is an apocalyptic number.

It is an amenable number.

20324789 is a deficient number, since it is larger than the sum of its proper divisors (1).

20324789 is an equidigital number, since it uses as much as digits as its factorization.

20324789 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24192, while the sum is 35.

The square root of 20324789 is about 4508.3022303302. The cubic root of 20324789 is about 272.9032337839.

The spelling of 20324789 in words is "twenty million, three hundred twenty-four thousand, seven hundred eighty-nine".