20219 has 2 divisors, whose sum is σ = 20220. Its totient is φ = 20218.

The previous prime is 20201. The next prime is 20231. The reversal of 20219 is 91202.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20219 - 2⁸ = 19963 is a prime.

It is a super-2 number, since 2×20219² = 817615922, which contains 22 as substring.

It is a Chen prime.

It is a plaindrome in base 6.

It is not a weakly prime, because it can be changed into another prime (20249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10109 + 10110.

It is an arithmetic number, because the mean of its divisors is an integer number (10110).

2²⁰²¹⁹ is an apocalyptic number.

20219 is a deficient number, since it is larger than the sum of its proper divisors (1).

20219 is an equidigital number, since it uses as much as digits as its factorization.

20219 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 20219 is about 142.1935300919. The cubic root of 20219 is about 27.2428929646.

The spelling of 20219 in words is "twenty thousand, two hundred nineteen".