20102219 has 2 divisors, whose sum is σ = 20102220. Its totient is φ = 20102218.
The previous prime is 20102213. The next prime is 20102227. The reversal of 20102219 is 91220102.
It is a weak prime.
It is a cyclic number.
It is not a de Polignac number, because 20102219 - 212 = 20098123 is a prime.
It is a super-2 number, since 2×201022192 = 808198417447922, which contains 22 as substring.
It is a Chen prime.
It is a junction number, because it is equal to n+sod(n) for n = 20102197 and 20102206.
It is not a weakly prime, because it can be changed into another prime (20102213) 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, 10051109 + 10051110.
It is an arithmetic number, because the mean of its divisors is an integer number (10051110).
Almost surely, 220102219 is an apocalyptic number.
20102219 is a deficient number, since it is larger than the sum of its proper divisors (1).
20102219 is an equidigital number, since it uses as much as digits as its factorization.
20102219 is an odious number, because the sum of its binary digits is odd.
The product of its (nonzero) digits is 72, while the sum is 17.
The square root of 20102219 is about 4483.5498212912. The cubic root of 20102219 is about 271.9034178073.
The spelling of 20102219 in words is "twenty million, one hundred two thousand, two hundred nineteen".
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