18341837513 has 2 divisors, whose sum is σ = 18341837514. Its totient is φ = 18341837512.

The previous prime is 18341837509. The next prime is 18341837519. The reversal of 18341837513 is 31573814381.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18330993664 + 10843849 = 135392^2 + 3293^2 .

It is a cyclic number.

It is not a de Polignac number, because 18341837513 - 2² = 18341837509 is a prime.

It is not a weakly prime, because it can be changed into another prime (18341837519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9170918756 + 9170918757.

It is an arithmetic number, because the mean of its divisors is an integer number (9170918757).

Almost surely, 2^18341837513 is an apocalyptic number.

It is an amenable number.

18341837513 is a deficient number, since it is larger than the sum of its proper divisors (1).

18341837513 is an equidigital number, since it uses as much as digits as its factorization.

18341837513 is an evil number, because the sum of its binary digits is even.

The product of its digits is 241920, while the sum is 44.

The spelling of 18341837513 in words is "eighteen billion, three hundred forty-one million, eight hundred thirty-seven thousand, five hundred thirteen".