20202243493 has 2 divisors, whose sum is σ = 20202243494. Its totient is φ = 20202243492.

The previous prime is 20202243491. The next prime is 20202243521. The reversal of 20202243493 is 39434220202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16958029729 + 3244213764 = 130223^2 + 56958^2 .

It is a cyclic number.

It is not a de Polignac number, because 20202243493 - 2¹ = 20202243491 is a prime.

Together with 20202243491, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20202243491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10101121746 + 10101121747.

It is an arithmetic number, because the mean of its divisors is an integer number (10101121747).

Almost surely, 2^20202243493 is an apocalyptic number.

It is an amenable number.

20202243493 is a deficient number, since it is larger than the sum of its proper divisors (1).

20202243493 is an equidigital number, since it uses as much as digits as its factorization.

20202243493 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20736, while the sum is 31.

Adding to 20202243493 its reverse (39434220202), we get a palindrome (59636463695).

The spelling of 20202243493 in words is "twenty billion, two hundred two million, two hundred forty-three thousand, four hundred ninety-three".