20312223293 has 2 divisors, whose sum is σ = 20312223294. Its totient is φ = 20312223292.

The previous prime is 20312223241. The next prime is 20312223301. The reversal of 20312223293 is 39232221302.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10173143044 + 10139080249 = 100862^2 + 100693^2 .

It is a cyclic number.

It is not a de Polignac number, because 20312223293 - 2¹⁰ = 20312222269 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20312223493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10156111646 + 10156111647.

It is an arithmetic number, because the mean of its divisors is an integer number (10156111647).

Almost surely, 2^20312223293 is an apocalyptic number.

It is an amenable number.

20312223293 is a deficient number, since it is larger than the sum of its proper divisors (1).

20312223293 is an equidigital number, since it uses as much as digits as its factorization.

20312223293 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7776, while the sum is 29.

Adding to 20312223293 its reverse (39232221302), we get a palindrome (59544444595).

The spelling of 20312223293 in words is "twenty billion, three hundred twelve million, two hundred twenty-three thousand, two hundred ninety-three".