20222789 has 2 divisors, whose sum is σ = 20222790. Its totient is φ = 20222788.

The previous prime is 20222779. The next prime is 20222791. The reversal of 20222789 is 98722202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17556100 + 2666689 = 4190^2 + 1633^2 .

It is a cyclic number.

It is not a de Polignac number, because 20222789 - 2¹⁶ = 20157253 is a prime.

It is a super-2 number, since 2×20222789² = 817922389877042, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 20222791, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is equal to p_1283837 and since 20222789 and 1283837 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20222729) 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, 10111394 + 10111395.

It is an arithmetic number, because the mean of its divisors is an integer number (10111395).

Almost surely, 2^20222789 is an apocalyptic number.

It is an amenable number.

20222789 is a deficient number, since it is larger than the sum of its proper divisors (1).

20222789 is an equidigital number, since it uses as much as digits as its factorization.

20222789 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 20222789 is about 4496.9755391819. The cubic root of 20222789 is about 272.4459461283.

The spelling of 20222789 in words is "twenty million, two hundred twenty-two thousand, seven hundred eighty-nine".