18319510799 has 2 divisors, whose sum is σ = 18319510800. Its totient is φ = 18319510798.

The previous prime is 18319510771. The next prime is 18319510883. The reversal of 18319510799 is 99701591381.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18319510799 - 2¹² = 18319506703 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18319510799.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18319510999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9159755399 + 9159755400.

It is an arithmetic number, because the mean of its divisors is an integer number (9159755400).

Almost surely, 2^18319510799 is an apocalyptic number.

18319510799 is a deficient number, since it is larger than the sum of its proper divisors (1).

18319510799 is an equidigital number, since it uses as much as digits as its factorization.

18319510799 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 612360, while the sum is 53.

The spelling of 18319510799 in words is "eighteen billion, three hundred nineteen million, five hundred ten thousand, seven hundred ninety-nine".