18126791 has 2 divisors, whose sum is σ = 18126792. Its totient is φ = 18126790.

The previous prime is 18126751. The next prime is 18126803. The reversal of 18126791 is 19762181.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18126791 - 2⁶ = 18126727 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is equal to p_1158866 and since 18126791 and 1158866 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18126751) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9063395 + 9063396.

It is an arithmetic number, because the mean of its divisors is an integer number (9063396).

Almost surely, 2^18126791 is an apocalyptic number.

18126791 is a deficient number, since it is larger than the sum of its proper divisors (1).

18126791 is an equidigital number, since it uses as much as digits as its factorization.

18126791 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6048, while the sum is 35.

The square root of 18126791 is about 4257.5569285683. The cubic root of 18126791 is about 262.6880454554.

The spelling of 18126791 in words is "eighteen million, one hundred twenty-six thousand, seven hundred ninety-one".