20512216223 has 2 divisors, whose sum is σ = 20512216224. Its totient is φ = 20512216222.

The previous prime is 20512216217. The next prime is 20512216243. The reversal of 20512216223 is 32261221502.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20512216223 - 2⁸ = 20512215967 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20512216192 and 20512216201.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20512216243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10256108111 + 10256108112.

It is an arithmetic number, because the mean of its divisors is an integer number (10256108112).

Almost surely, 2^20512216223 is an apocalyptic number.

20512216223 is a deficient number, since it is larger than the sum of its proper divisors (1).

20512216223 is an equidigital number, since it uses as much as digits as its factorization.

20512216223 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2880, while the sum is 26.

Adding to 20512216223 its reverse (32261221502), we get a palindrome (52773437725).

The spelling of 20512216223 in words is "twenty billion, five hundred twelve million, two hundred sixteen thousand, two hundred twenty-three".