18339791269 has 2 divisors, whose sum is σ = 18339791270. Its totient is φ = 18339791268.

The previous prime is 18339791251. The next prime is 18339791293. The reversal of 18339791269 is 96219793381.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17167550625 + 1172240644 = 131025^2 + 34238^2 .

It is an emirp because it is prime and its reverse (96219793381) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18339791269 - 2⁵ = 18339791237 is a prime.

It is a super-2 number, since 2×18339791269² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18339794269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9169895634 + 9169895635.

It is an arithmetic number, because the mean of its divisors is an integer number (9169895635).

Almost surely, 2^18339791269 is an apocalyptic number.

It is an amenable number.

18339791269 is a deficient number, since it is larger than the sum of its proper divisors (1).

18339791269 is an equidigital number, since it uses as much as digits as its factorization.

18339791269 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4408992, while the sum is 58.

The spelling of 18339791269 in words is "eighteen billion, three hundred thirty-nine million, seven hundred ninety-one thousand, two hundred sixty-nine".