20304029 has 2 divisors, whose sum is σ = 20304030. Its totient is φ = 20304028.

The previous prime is 20304023. The next prime is 20304049. The reversal of 20304029 is 92040302.

It is an a-pointer prime, because the next prime (20304049) can be obtained adding 20304029 to its sum of digits (20).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18619225 + 1684804 = 4315^2 + 1298^2 .

It is a cyclic number.

It is not a de Polignac number, because 20304029 - 2⁴ = 20304013 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20304029.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20304023) 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, 10152014 + 10152015.

It is an arithmetic number, because the mean of its divisors is an integer number (10152015).

Almost surely, 2^20304029 is an apocalyptic number.

It is an amenable number.

20304029 is a deficient number, since it is larger than the sum of its proper divisors (1).

20304029 is an equidigital number, since it uses as much as digits as its factorization.

20304029 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 20304029 is about 4505.9992232578. Note that the first 3 decimals coincide. The cubic root of 20304029 is about 272.8102865105.

The spelling of 20304029 in words is "twenty million, three hundred four thousand, twenty-nine".