20312202223 has 4 divisors (see below), whose sum is σ = 20343891168. Its totient is φ = 20280513280.

The previous prime is 20312202193. The next prime is 20312202233. The reversal of 20312202223 is 32220221302.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32220221302 = 2 ⋅16110110651.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20312202223 is a prime.

It is a super-2 number, since 2×20312202223² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20312202223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20312202233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15843511 + ... + 15844792.

It is an arithmetic number, because the mean of its divisors is an integer number (5085972792).

Almost surely, 2^20312202223 is an apocalyptic number.

20312202223 is a deficient number, since it is larger than the sum of its proper divisors (31688945).

20312202223 is an equidigital number, since it uses as much as digits as its factorization.

20312202223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31688944.

The product of its (nonzero) digits is 576, while the sum is 19.

Adding to 20312202223 its reverse (32220221302), we get a palindrome (52532423525).

The spelling of 20312202223 in words is "twenty billion, three hundred twelve million, two hundred two thousand, two hundred twenty-three".