20110229 has 2 divisors, whose sum is σ = 20110230. Its totient is φ = 20110228.

The previous prime is 20110217. The next prime is 20110231. The reversal of 20110229 is 92201102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11122225 + 8988004 = 3335^2 + 2998^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20110229 is a prime.

It is a Sophie Germain prime.

Together with 20110231, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20110429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10055114 + 10055115.

It is an arithmetic number, because the mean of its divisors is an integer number (10055115).

Almost surely, 2^20110229 is an apocalyptic number.

It is an amenable number.

20110229 is a deficient number, since it is larger than the sum of its proper divisors (1).

20110229 is an equidigital number, since it uses as much as digits as its factorization.

20110229 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 17.

The square root of 20110229 is about 4484.4429977423. The cubic root of 20110229 is about 271.9395275383.

The spelling of 20110229 in words is "twenty million, one hundred ten thousand, two hundred twenty-nine".