20016229 has 2 divisors, whose sum is σ = 20016230. Its totient is φ = 20016228.

The previous prime is 20016221. The next prime is 20016251. The reversal of 20016229 is 92261002.

It is a happy number.

It is an a-pointer prime, because the next prime (20016251) can be obtained adding 20016229 to its sum of digits (22).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16769025 + 3247204 = 4095^2 + 1802^2 .

It is a cyclic number.

It is not a de Polignac number, because 20016229 - 2³ = 20016221 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 (20016221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10008114 + 10008115.

It is an arithmetic number, because the mean of its divisors is an integer number (10008115).

Almost surely, 2^20016229 is an apocalyptic number.

It is an amenable number.

20016229 is a deficient number, since it is larger than the sum of its proper divisors (1).

20016229 is an equidigital number, since it uses as much as digits as its factorization.

20016229 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 20016229 is about 4473.9500444238. The cubic root of 20016229 is about 271.5151622819.

The spelling of 20016229 in words is "twenty million, sixteen thousand, two hundred twenty-nine".