18091677337 has 2 divisors, whose sum is σ = 18091677338. Its totient is φ = 18091677336.

The previous prime is 18091677323. The next prime is 18091677377. The reversal of 18091677337 is 73377619081.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17347260681 + 744416656 = 131709^2 + 27284^2 .

It is a cyclic number.

It is not a de Polignac number, because 18091677337 - 2⁷ = 18091677209 is a prime.

It is a super-2 number, since 2×18091677337² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (18091677377) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9045838668 + 9045838669.

It is an arithmetic number, because the mean of its divisors is an integer number (9045838669).

Almost surely, 2^18091677337 is an apocalyptic number.

It is an amenable number.

18091677337 is a deficient number, since it is larger than the sum of its proper divisors (1).

18091677337 is an equidigital number, since it uses as much as digits as its factorization.

18091677337 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1333584, while the sum is 52.

The spelling of 18091677337 in words is "eighteen billion, ninety-one million, six hundred seventy-seven thousand, three hundred thirty-seven".