20022221237 has 2 divisors, whose sum is σ = 20022221238. Its totient is φ = 20022221236.

The previous prime is 20022221221. The next prime is 20022221243. The reversal of 20022221237 is 73212222002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12129497956 + 7892723281 = 110134^2 + 88841^2 .

It is a cyclic number.

It is not a de Polignac number, because 20022221237 - 2⁴ = 20022221221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20022229237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10011110618 + 10011110619.

It is an arithmetic number, because the mean of its divisors is an integer number (10011110619).

Almost surely, 2^20022221237 is an apocalyptic number.

It is an amenable number.

20022221237 is a deficient number, since it is larger than the sum of its proper divisors (1).

20022221237 is an equidigital number, since it uses as much as digits as its factorization.

20022221237 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1344, while the sum is 23.

Adding to 20022221237 its reverse (73212222002), we get a palindrome (93234443239).

The spelling of 20022221237 in words is "twenty billion, twenty-two million, two hundred twenty-one thousand, two hundred thirty-seven".