20852219 has 2 divisors, whose sum is σ = 20852220. Its totient is φ = 20852218.

The previous prime is 20852207. The next prime is 20852261. The reversal of 20852219 is 91225802.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20852219 - 2²⁴ = 4075003 is a prime.

It is a super-2 number, since 2×20852219² = 869630074447922, 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 = 20852191 and 20852200.

It is not a weakly prime, because it can be changed into another prime (20842219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10426109 + 10426110.

It is an arithmetic number, because the mean of its divisors is an integer number (10426110).

Almost surely, 2^20852219 is an apocalyptic number.

20852219 is a deficient number, since it is larger than the sum of its proper divisors (1).

20852219 is an equidigital number, since it uses as much as digits as its factorization.

20852219 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2880, while the sum is 29.

The square root of 20852219 is about 4566.4229983654. The cubic root of 20852219 is about 275.2437244263.

The spelling of 20852219 in words is "twenty million, eight hundred fifty-two thousand, two hundred nineteen".