13618368893 has 2 divisors, whose sum is σ = 13618368894. Its totient is φ = 13618368892.

The previous prime is 13618368847. The next prime is 13618368947. The reversal of 13618368893 is 39886381631.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8998040164 + 4620328729 = 94858^2 + 67973^2 .

It is a cyclic number.

It is not a de Polignac number, because 13618368893 - 2⁸ = 13618368637 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13618368833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6809184446 + 6809184447.

It is an arithmetic number, because the mean of its divisors is an integer number (6809184447).

Almost surely, 2^13618368893 is an apocalyptic number.

It is an amenable number.

13618368893 is a deficient number, since it is larger than the sum of its proper divisors (1).

13618368893 is an equidigital number, since it uses as much as digits as its factorization.

13618368893 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4478976, while the sum is 56.

The spelling of 13618368893 in words is "thirteen billion, six hundred eighteen million, three hundred sixty-eight thousand, eight hundred ninety-three".