18668852231 has 2 divisors, whose sum is σ = 18668852232. Its totient is φ = 18668852230.

The previous prime is 18668852183. The next prime is 18668852239. The reversal of 18668852231 is 13225886681.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18668852231 is a prime.

It is a super-2 number, since 2×18668852231² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 18668852231.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18668852239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9334426115 + 9334426116.

It is an arithmetic number, because the mean of its divisors is an integer number (9334426116).

Almost surely, 2^18668852231 is an apocalyptic number.

18668852231 is a deficient number, since it is larger than the sum of its proper divisors (1).

18668852231 is an equidigital number, since it uses as much as digits as its factorization.

18668852231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1105920, while the sum is 50.

The spelling of 18668852231 in words is "eighteen billion, six hundred sixty-eight million, eight hundred fifty-two thousand, two hundred thirty-one".