20702219 has 2 divisors, whose sum is σ = 20702220. Its totient is φ = 20702218.

The previous prime is 20702189. The next prime is 20702233. The reversal of 20702219 is 91220702.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20702219 - 2¹² = 20698123 is a prime.

It is a super-2 number, since 2×20702219² = 857163743047922, 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 = 20702194 and 20702203.

It is not a weakly prime, because it can be changed into another prime (20702239) 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, 10351109 + 10351110.

It is an arithmetic number, because the mean of its divisors is an integer number (10351110).

Almost surely, 2^20702219 is an apocalyptic number.

20702219 is a deficient number, since it is larger than the sum of its proper divisors (1).

20702219 is an equidigital number, since it uses as much as digits as its factorization.

20702219 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 504, while the sum is 23.

The square root of 20702219 is about 4549.9691207743. The cubic root of 20702219 is about 274.5821488852.

The spelling of 20702219 in words is "twenty million, seven hundred two thousand, two hundred nineteen".