18787049011 has 2 divisors, whose sum is σ = 18787049012. Its totient is φ = 18787049010.

The previous prime is 18787048967. The next prime is 18787049059. The reversal of 18787049011 is 11094078781.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (11094078781) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18787049011 - 2⁷ = 18787048883 is a prime.

It is not a weakly prime, because it can be changed into another prime (18787049711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9393524505 + 9393524506.

It is an arithmetic number, because the mean of its divisors is an integer number (9393524506).

Almost surely, 2^18787049011 is an apocalyptic number.

18787049011 is a deficient number, since it is larger than the sum of its proper divisors (1).

18787049011 is an equidigital number, since it uses as much as digits as its factorization.

18787049011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 112896, while the sum is 46.

The spelling of 18787049011 in words is "eighteen billion, seven hundred eighty-seven million, forty-nine thousand, eleven".