18268651223 has 2 divisors, whose sum is σ = 18268651224. Its totient is φ = 18268651222.

The previous prime is 18268651213. The next prime is 18268651241. The reversal of 18268651223 is 32215686281.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18268651223 - 2¹⁰ = 18268650199 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18268651213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9134325611 + 9134325612.

It is an arithmetic number, because the mean of its divisors is an integer number (9134325612).

Almost surely, 2^18268651223 is an apocalyptic number.

18268651223 is a deficient number, since it is larger than the sum of its proper divisors (1).

18268651223 is an equidigital number, since it uses as much as digits as its factorization.

18268651223 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 276480, while the sum is 44.

The spelling of 18268651223 in words is "eighteen billion, two hundred sixty-eight million, six hundred fifty-one thousand, two hundred twenty-three".