20302729 has 2 divisors, whose sum is σ = 20302730. Its totient is φ = 20302728.

The previous prime is 20302699. The next prime is 20302739. The reversal of 20302729 is 92720302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19404025 + 898704 = 4405^2 + 948^2 .

It is a cyclic number.

It is not a de Polignac number, because 20302729 - 2¹¹ = 20300681 is a prime.

It is not a weakly prime, because it can be changed into another prime (20302739) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10151364 + 10151365.

It is an arithmetic number, because the mean of its divisors is an integer number (10151365).

Almost surely, 2^20302729 is an apocalyptic number.

It is an amenable number.

20302729 is a deficient number, since it is larger than the sum of its proper divisors (1).

20302729 is an equidigital number, since it uses as much as digits as its factorization.

20302729 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 25.

The square root of 20302729 is about 4505.8549688156. The cubic root of 20302729 is about 272.8044640053.

The spelling of 20302729 in words is "twenty million, three hundred two thousand, seven hundred twenty-nine".