20311330223 has 2 divisors, whose sum is σ = 20311330224. Its totient is φ = 20311330222.

The previous prime is 20311330219. The next prime is 20311330253. The reversal of 20311330223 is 32203311302.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20311330223 - 2² = 20311330219 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 20311330195 and 20311330204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20311330253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10155665111 + 10155665112.

It is an arithmetic number, because the mean of its divisors is an integer number (10155665112).

Almost surely, 2^20311330223 is an apocalyptic number.

20311330223 is a deficient number, since it is larger than the sum of its proper divisors (1).

20311330223 is an equidigital number, since it uses as much as digits as its factorization.

20311330223 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 20.

Adding to 20311330223 its reverse (32203311302), we get a palindrome (52514641525).

The spelling of 20311330223 in words is "twenty billion, three hundred eleven million, three hundred thirty thousand, two hundred twenty-three".