18918920299 has 2 divisors, whose sum is σ = 18918920300. Its totient is φ = 18918920298.

The previous prime is 18918920297. The next prime is 18918920303. The reversal of 18918920299 is 99202981981.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18918920299 - 2¹ = 18918920297 is a prime.

Together with 18918920297, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (18918920291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9459460149 + 9459460150.

It is an arithmetic number, because the mean of its divisors is an integer number (9459460150).

Almost surely, 2^18918920299 is an apocalyptic number.

18918920299 is a deficient number, since it is larger than the sum of its proper divisors (1).

18918920299 is an equidigital number, since it uses as much as digits as its factorization.

18918920299 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1679616, while the sum is 58.

The spelling of 18918920299 in words is "eighteen billion, nine hundred eighteen million, nine hundred twenty thousand, two hundred ninety-nine".