18499180699 has 2 divisors, whose sum is σ = 18499180700. Its totient is φ = 18499180698.

The previous prime is 18499180697. The next prime is 18499180703. The reversal of 18499180699 is 99608199481.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18499180699 - 2¹ = 18499180697 is a prime.

Together with 18499180697, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 18499180699.

It is not a weakly prime, because it can be changed into another prime (18499180697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9249590349 + 9249590350.

It is an arithmetic number, because the mean of its divisors is an integer number (9249590350).

Almost surely, 2^18499180699 is an apocalyptic number.

18499180699 is a deficient number, since it is larger than the sum of its proper divisors (1).

18499180699 is an equidigital number, since it uses as much as digits as its factorization.

18499180699 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10077696, while the sum is 64.

The spelling of 18499180699 in words is "eighteen billion, four hundred ninety-nine million, one hundred eighty thousand, six hundred ninety-nine".