20022311321993 has 2 divisors, whose sum is σ = 20022311321994. Its totient is φ = 20022311321992.

The previous prime is 20022311321939. The next prime is 20022311322017. The reversal of 20022311321993 is 39912311322002.

It is a happy number.

Together with previous prime (20022311321939) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19390521620089 + 631789701904 = 4403467^2 + 794852^2 .

It is a cyclic number.

It is not a de Polignac number, because 20022311321993 - 2²⁸ = 20022042886537 is a prime.

It is not a weakly prime, because it can be changed into another prime (20022311321923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10011155660996 + 10011155660997.

It is an arithmetic number, because the mean of its divisors is an integer number (10011155660997).

Almost surely, 2^{20022311321993} is an apocalyptic number.

It is an amenable number.

20022311321993 is a deficient number, since it is larger than the sum of its proper divisors (1).

20022311321993 is an equidigital number, since it uses as much as digits as its factorization.

20022311321993 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34992, while the sum is 38.

Adding to 20022311321993 its reverse (39912311322002), we get a palindrome (59934622643995).

The spelling of 20022311321993 in words is "twenty trillion, twenty-two billion, three hundred eleven million, three hundred twenty-one thousand, nine hundred ninety-three".