18458211313 has 2 divisors, whose sum is σ = 18458211314. Its totient is φ = 18458211312.

The previous prime is 18458211241. The next prime is 18458211323. The reversal of 18458211313 is 31311285481.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18266333409 + 191877904 = 135153^2 + 13852^2 .

It is a cyclic number.

It is not a de Polignac number, because 18458211313 - 2¹³ = 18458203121 is a prime.

It is a super-2 number, since 2×18458211313² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (18458211323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9229105656 + 9229105657.

It is an arithmetic number, because the mean of its divisors is an integer number (9229105657).

Almost surely, 2^18458211313 is an apocalyptic number.

It is an amenable number.

18458211313 is a deficient number, since it is larger than the sum of its proper divisors (1).

18458211313 is an equidigital number, since it uses as much as digits as its factorization.

18458211313 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23040, while the sum is 37.

Adding to 18458211313 its reverse (31311285481), we get a palindrome (49769496794).

The spelling of 18458211313 in words is "eighteen billion, four hundred fifty-eight million, two hundred eleven thousand, three hundred thirteen".