18966469818239 has 2 divisors, whose sum is σ = 18966469818240. Its totient is φ = 18966469818238.

The previous prime is 18966469818187. The next prime is 18966469818277. The reversal of 18966469818239 is 93281896466981.

It is a strong prime.

It is an emirp because it is prime and its reverse (93281896466981) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18966469818239 is a prime.

It is a super-2 number, since 2×18966469818239² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18966469812239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9483234909119 + 9483234909120.

It is an arithmetic number, because the mean of its divisors is an integer number (9483234909120).

Almost surely, 2^{18966469818239} is an apocalyptic number.

18966469818239 is a deficient number, since it is larger than the sum of its proper divisors (1).

18966469818239 is an equidigital number, since it uses as much as digits as its factorization.

18966469818239 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1934917632, while the sum is 80.

The spelling of 18966469818239 in words is "eighteen trillion, nine hundred sixty-six billion, four hundred sixty-nine million, eight hundred eighteen thousand, two hundred thirty-nine".