20022200221993 has 2 divisors, whose sum is σ = 20022200221994. Its totient is φ = 20022200221992.

The previous prime is 20022200221963. The next prime is 20022200222009. The reversal of 20022200221993 is 39912200222002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19459320657984 + 562879564009 = 4411272^2 + 750253^2 .

It is a cyclic number.

It is not a de Polignac number, because 20022200221993 - 2¹³ = 20022200213801 is a prime.

It is not a weakly prime, because it can be changed into another prime (20022200221963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10011100110996 + 10011100110997.

It is an arithmetic number, because the mean of its divisors is an integer number (10011100110997).

Almost surely, 2^{20022200221993} is an apocalyptic number.

It is an amenable number.

20022200221993 is a deficient number, since it is larger than the sum of its proper divisors (1).

20022200221993 is an equidigital number, since it uses as much as digits as its factorization.

20022200221993 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15552, while the sum is 34.

Adding to 20022200221993 its reverse (39912200222002), we get a palindrome (59934400443995).

The spelling of 20022200221993 in words is "twenty trillion, twenty-two billion, two hundred million, two hundred twenty-one thousand, nine hundred ninety-three".