20220220221989 has 2 divisors, whose sum is σ = 20220220221990. Its totient is φ = 20220220221988.

The previous prime is 20220220221911. The next prime is 20220220222003. The reversal of 20220220221989 is 98912202202202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12631214537764 + 7589005684225 = 3554042^2 + 2754815^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20220220221989 is a prime.

It is a super-2 number, since 2×20220220221989² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20220220221389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10110110110994 + 10110110110995.

It is an arithmetic number, because the mean of its divisors is an integer number (10110110110995).

Almost surely, 2^{20220220221989} is an apocalyptic number.

It is an amenable number.

20220220221989 is a deficient number, since it is larger than the sum of its proper divisors (1).

20220220221989 is an equidigital number, since it uses as much as digits as its factorization.

20220220221989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 82944, while the sum is 41.

The spelling of 20220220221989 in words is "twenty trillion, two hundred twenty billion, two hundred twenty million, two hundred twenty-one thousand, nine hundred eighty-nine".