18306090013 has 2 divisors, whose sum is σ = 18306090014. Its totient is φ = 18306090012.

The previous prime is 18306089981. The next prime is 18306090031. The reversal of 18306090013 is 31009060381.

Together with next prime (18306090031) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18139241124 + 166848889 = 134682^2 + 12917^2 .

It is a cyclic number.

It is not a de Polignac number, because 18306090013 - 2⁵ = 18306089981 is a prime.

It is a super-2 number, since 2×18306090013² (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 (18306090043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9153045006 + 9153045007.

It is an arithmetic number, because the mean of its divisors is an integer number (9153045007).

Almost surely, 2^18306090013 is an apocalyptic number.

It is an amenable number.

18306090013 is a deficient number, since it is larger than the sum of its proper divisors (1).

18306090013 is an equidigital number, since it uses as much as digits as its factorization.

18306090013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888, while the sum is 31.

The spelling of 18306090013 in words is "eighteen billion, three hundred six million, ninety thousand, thirteen".