18283278911 has 2 divisors, whose sum is σ = 18283278912. Its totient is φ = 18283278910.

The previous prime is 18283278877. The next prime is 18283278929. The reversal of 18283278911 is 11987238281.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18283278911 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18283278911.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18283278011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9141639455 + 9141639456.

It is an arithmetic number, because the mean of its divisors is an integer number (9141639456).

Almost surely, 2^18283278911 is an apocalyptic number.

18283278911 is a deficient number, since it is larger than the sum of its proper divisors (1).

18283278911 is an equidigital number, since it uses as much as digits as its factorization.

18283278911 is an evil number, because the sum of its binary digits is even.

The product of its digits is 387072, while the sum is 50.

The spelling of 18283278911 in words is "eighteen billion, two hundred eighty-three million, two hundred seventy-eight thousand, nine hundred eleven".