18105065137 has 2 divisors, whose sum is σ = 18105065138. Its totient is φ = 18105065136.

The previous prime is 18105065123. The next prime is 18105065141. The reversal of 18105065137 is 73156050181.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17987906161 + 117158976 = 134119^2 + 10824^2 .

It is a cyclic number.

It is not a de Polignac number, because 18105065137 - 2¹¹ = 18105063089 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18105065096 and 18105065105.

It is not a weakly prime, because it can be changed into another prime (18105065437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9052532568 + 9052532569.

It is an arithmetic number, because the mean of its divisors is an integer number (9052532569).

Almost surely, 2^18105065137 is an apocalyptic number.

It is an amenable number.

18105065137 is a deficient number, since it is larger than the sum of its proper divisors (1).

18105065137 is an equidigital number, since it uses as much as digits as its factorization.

18105065137 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25200, while the sum is 37.

The spelling of 18105065137 in words is "eighteen billion, one hundred five million, sixty-five thousand, one hundred thirty-seven".