20222689 has 2 divisors, whose sum is σ = 20222690. Its totient is φ = 20222688.

The previous prime is 20222621. The next prime is 20222723. The reversal of 20222689 is 98622202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16744464 + 3478225 = 4092^2 + 1865^2 .

It is a cyclic number.

It is not a de Polignac number, because 20222689 - 2⁷ = 20222561 is a prime.

It is a super-3 number, since 3×20222689³ (a number of 23 digits) contains 333 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20222689.

It is not a weakly prime, because it can be changed into another prime (20222789) 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, 10111344 + 10111345.

It is an arithmetic number, because the mean of its divisors is an integer number (10111345).

Almost surely, 2^20222689 is an apocalyptic number.

It is an amenable number.

20222689 is a deficient number, since it is larger than the sum of its proper divisors (1).

20222689 is an equidigital number, since it uses as much as digits as its factorization.

20222689 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 20222689 is about 4496.9644205842. The cubic root of 20222689 is about 272.4454970534.

The spelling of 20222689 in words is "twenty million, two hundred twenty-two thousand, six hundred eighty-nine".