18423298913 has 2 divisors, whose sum is σ = 18423298914. Its totient is φ = 18423298912.

The previous prime is 18423298891. The next prime is 18423298981. The reversal of 18423298913 is 31989232481.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17309875489 + 1113423424 = 131567^2 + 33368^2 .

It is an emirp because it is prime and its reverse (31989232481) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18423298913 - 2¹⁴ = 18423282529 is a prime.

It is not a weakly prime, because it can be changed into another prime (18423298213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9211649456 + 9211649457.

It is an arithmetic number, because the mean of its divisors is an integer number (9211649457).

Almost surely, 2^18423298913 is an apocalyptic number.

It is an amenable number.

18423298913 is a deficient number, since it is larger than the sum of its proper divisors (1).

18423298913 is an equidigital number, since it uses as much as digits as its factorization.

18423298913 is an evil number, because the sum of its binary digits is even.

The product of its digits is 746496, while the sum is 50.

The spelling of 18423298913 in words is "eighteen billion, four hundred twenty-three million, two hundred ninety-eight thousand, nine hundred thirteen".