18335368369 has 2 divisors, whose sum is σ = 18335368370. Its totient is φ = 18335368368.

The previous prime is 18335368339. The next prime is 18335368393. The reversal of 18335368369 is 96386353381.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16358410000 + 1976958369 = 127900^2 + 44463^2 .

It is a cyclic number.

It is not a de Polignac number, because 18335368369 - 2²⁷ = 18201150641 is a prime.

It is a super-2 number, since 2×18335368369² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (18335368339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9167684184 + 9167684185.

It is an arithmetic number, because the mean of its divisors is an integer number (9167684185).

Almost surely, 2^18335368369 is an apocalyptic number.

It is an amenable number.

18335368369 is a deficient number, since it is larger than the sum of its proper divisors (1).

18335368369 is an equidigital number, since it uses as much as digits as its factorization.

18335368369 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8398080, while the sum is 55.

The spelling of 18335368369 in words is "eighteen billion, three hundred thirty-five million, three hundred sixty-eight thousand, three hundred sixty-nine".