18279013 has 2 divisors, whose sum is σ = 18279014. Its totient is φ = 18279012.

The previous prime is 18278987. The next prime is 18279017. The reversal of 18279013 is 31097281.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11404129 + 6874884 = 3377^2 + 2622^2 .

It is a cyclic number.

It is not a de Polignac number, because 18279013 - 2⁹ = 18278501 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18279017) 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, 9139506 + 9139507.

It is an arithmetic number, because the mean of its divisors is an integer number (9139507).

Almost surely, 2^18279013 is an apocalyptic number.

It is an amenable number.

18279013 is a deficient number, since it is larger than the sum of its proper divisors (1).

18279013 is an equidigital number, since it uses as much as digits as its factorization.

18279013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3024, while the sum is 31.

The square root of 18279013 is about 4275.3962389467. The cubic root of 18279013 is about 263.4213152931.

It can be divided in two parts, 1827901 and 3, that added together give a square (1827904 = 1352²).

The spelling of 18279013 in words is "eighteen million, two hundred seventy-nine thousand, thirteen".