20800229 has 2 divisors, whose sum is σ = 20800230. Its totient is φ = 20800228.

The previous prime is 20800201. The next prime is 20800277. The reversal of 20800229 is 92200802.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11356900 + 9443329 = 3370^2 + 3073^2 .

It is a cyclic number.

It is not a de Polignac number, because 20800229 - 2⁸ = 20799973 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is equal to p_1318145 and since 20800229 and 1318145 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20800529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10400114 + 10400115.

It is an arithmetic number, because the mean of its divisors is an integer number (10400115).

Almost surely, 2^20800229 is an apocalyptic number.

It is an amenable number.

20800229 is a deficient number, since it is larger than the sum of its proper divisors (1).

20800229 is an equidigital number, since it uses as much as digits as its factorization.

20800229 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 20800229 is about 4560.7268061133. The cubic root of 20800229 is about 275.0147826764.

The spelling of 20800229 in words is "twenty million, eight hundred thousand, two hundred twenty-nine".